Calculate the gradient of a river if the change of elevation is 1500ft and the length of the river is 72 miles.

Answers

Answer 1

The gradient of the river is approximately 0.3947%, calculated by dividing the change in elevation of 1500 feet by the horizontal distance of 72 miles (converted to 380,160 feet).

The gradient of a river is the change in elevation divided by the horizontal distance.

Given that the change of elevation is 1500ft and the length of the river is 72 miles, we first need to convert the units to a consistent system. Let's convert the length from miles to feet, since the change in elevation is given in feet

72 miles = 72 x 5280 feet

72 miles = 380,160 feet

Now we can calculate the gradient using the formula

gradient = change in elevation / horizontal distance

gradient = 1500 ft / 380,160 ft

Simplifying, we get

gradient = 0.003947

Therefore, the gradient of the river is approximately 0.003947, which can be expressed as a percentage by multiplying by 100

gradient = 0.003947 * 100

gradient = 0.3947%

So, the gradient of the river is approximately 0.3947%.

To know more about gradient:

https://brainly.com/question/13050811

#SPJ1


Related Questions

According to one study, 61% of the population swallow at least one spider per year in their sleep. Based on this study, what is the probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their sleep in the last year.

Answers

The probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their sleep in the last year is approximately 0.0248 or 2.48%.

This problem involves a binomial probability distribution, where:

n = 10 (number of trials)

p = 0.61 (probability of success, i.e. swallowing at least one spider per year)

x = 7 (number of successes we want to find)

The probability of exactly x successes is given by the formula:

[tex]P(x) = (nCx) * p^x * (1-p)^(n-x)[/tex]

where nCx is the binomial coefficient, given by:

[tex]nCx = n! / (x! * (n-x)!)[/tex]

Plugging in the values:

[tex]nCx = 10! / (7! * (10-7)!) = 120[/tex]

[tex]p^x = 0.61^7 = 0.0277[/tex]

[tex](1-p)^(n-x) = (1-0.61)^(10-7)[/tex] = 0.077161

P(x) = 120 * 0.0277 * 0.077161 = 0.0248

Therefore, the probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their sleep in the last year is approximately 0.0248 or 2.48%.

Learn more about probability

https://brainly.com/question/30034780

#SPJ4

what is the probability that one of the molecules chosen at random has traveled 15 um or more from is starting location

Answers

The probability that one of the molecules chosen at random has traveled 15 um or more from its starting location is approximately 0.0004, assuming a diffusion coefficient of 10 um^2/s and a time elapsed of 1 second.

To calculate the probability that one of the molecules chosen at random has traveled 15 um or more from its starting location, we need to know the distribution of distances traveled by the molecules. If we assume that the molecules move randomly and independently, we can model their displacements as a Gaussian (normal) distribution with mean zero and a standard deviation of σ, where σ is the root mean square displacement (RMSD) of the molecules.

The RMSD is a measure of how much the molecules move on average over a given time period, and can be calculated from the diffusion coefficient of the molecules and the time elapsed. For example, if the diffusion coefficient is D and the time elapsed is t, then the RMSD is given by σ = sqrt(2Dt).

Assuming that the molecules have a diffusion coefficient of 10 um^2/s and the time elapsed is 1 second, we can calculate the RMSD as σ = sqrt(2*10 um^2/s * 1 s) = sqrt(20) um ≈ 4.47 um.

Using this value of σ, we can calculate the probability that a randomly chosen molecule has traveled 15 um or more from its starting location as follows:

P(X ≥ 15) = 1 - P(X < 15)

where X is a random variable representing the distance traveled by a molecule. Since X is normally distributed with mean zero and standard deviation σ, we can standardize it using the formula:

Z = (X - μ) / σ

where Z is a standard normal variable with mean 0 and standard deviation 1, and μ is the mean of X, which is 0 in this case.

Substituting X = 15 and σ = 4.47 into the formula for Z, we get:

Z = (15 - 0) / 4.47 ≈ 3.35

Looking up the probability of Z being greater than or equal to 3.35 in a standard normal distribution table, we find that it is approximately 0.0004.

Know more about probability here:

https://brainly.com/question/30034780

#SPJ11

A sociologist finds that for a certain segment of the population, the number of years of formal education have a mean of 13.2 years and a standard deviation of 2.96 years.if 35 people are randomly selected from this group, find the probability that their mean years of education is at least 12 years.

Answers

To find the probability that the mean years of education for a sample of 35 people is at least 12 years, we need to use the Central Limit Theorem (CLT) and the properties of the normal distribution.

Given:

- Mean (μ) of the population = 13.2 years

- Standard deviation (σ) of the population = 2.96 years

- Sample size (n) = 35

Using the CLT, we know that for a sufficiently large sample size (n ≥ 30), the sampling distribution of the sample mean approaches a normal distribution, regardless of the shape of the population distribution.

To calculate the probability, we need to standardize the sample mean using the z-score formula and then find the corresponding area under the standard normal curve.

Step 1: Calculate the standard error of the mean (SE):

SE = σ / √n

SE = 2.96 / √35

SE ≈ 0.5013

Step 2: Calculate the z-score for the given mean of 12 years:

z = (x - μ) / SE

z = (12 - 13.2) / 0.5013

z ≈ -2.395

Step 3: Find the area under the standard normal curve for z ≥ -2.395:

P(z ≥ -2.395) can be obtained using a standard normal distribution table or a calculator. The corresponding area is approximately 0.9911.

Therefore, the probability that the mean years of education for a sample of 35 people is at least 12 years is approximately 0.9911, or 99.11%.

To know more about probability refer here

https://brainly.com/question/31828911#

#SPJ11

A system initially at 97 degrees Celsius experiences a change to 86 degrees Celsius. Did the system experience an endothermic or exothermic change and why

Answers

We can conclude that the system experienced an exothermic change

Based on the given information, we know that the system initially had a higher temperature of 97 degrees Celsius, and then it experienced a change to a lower temperature of 86 degrees Celsius.

A decrease in temperature usually indicates that energy is lost from the system to the surroundings, either by heat transfer or some other form of energy transfer. Since the system has lost energy, this implies that the change was exothermic, meaning that heat was released from the system to the surroundings.

Therefore, based on the information given, we can conclude that the system experienced an exothermic change

Learn more about exothermic change

https://brainly.com/question/29555731

#SPJ4

According to a popular model of temperament forwarded by Buss and Plomin, how many general temperaments are there

Answers

Buss and Plomin's model of temperament proposes that there are three general temperaments: emotionality, activity, and sociability.

These temperaments are believed to be genetically based and to influence an individual's personality traits and behaviors throughout their life. Emotionality refers to an individual's tendency to experience strong emotional reactions, while activity refers to an individual's level of energy and impulsiveness.

Emotionality refers to an individual's tendency to experience and express emotions, such as fear, anger, and sadness.

Activity refers to an individual's level of physical and mental energy, and their tendency to seek out stimulation and engage in activities.

Sociability refers to an individual's preference for social interaction, including their level of interest in and enjoyment of socializing with others.

According to Buss and Plomin's model, these three temperaments are considered to be broad, genetically influenced traits that are present in varying degrees in every individual, and which can have a significant impact on a person's personality and behavior throughout their life.

Sociability, on the other hand, refers to an individual's degree of interest in social interaction and the degree to which they seek out social stimulation.

for such more question on Buss and Plomin's model

https://brainly.com/question/10188888

#SPJ11

1. Why does the expression 6x + 2 represent the number of people
who can sit at x tables placed end-to-end? Explain.
O A. There are 3 people per long side, so there are 9 people per
table. For x tables, there are 9x people in total. The end
tables can seat 1 person at each end, which adds 2 more
people.
OB. There are 3 people per long side, so there are 6 people per
table. For x tables, there are 6x people in total. The end
tables can seat 1 person at each end, which adds 2 more
people.
OC. There are 6 people per long side, so there are 12 people
per table. For x tables, there are 12x people in total. The
end tables can seat 1 person at each end, which adds 2
more people.
O D. There are 3 people per long side, so there are 6 people per
table. For x tables, there are 6x people in total. The end
tables can seat 2 people at each end, which adds 4 more
people.

Answers

The expression 6x + 2 represents the number of people who can sit at x tables placed end-to-end because there are 3 people per long side, so there are 6 people per table. For x tables, there are 6x people in total. The end tables can seat 1 person at each end, which adds 2 more people. Therefore, there are 6x + 2 people who can sit at x tables placed end-to-end.

Answer: B. there are 3 people per long side. so 6 people per table. for x tables there are 6x people in total. the end tables can seat 1 person at each end which adds 2 more people.

The width w of a credit card is 3 centimeters shorter than the length l. The area is 46.75 square centimeters. Find the perimeter. The perimeter is centimeters.

Answers

The length of the credit card is either l = 8.5 or l = -5.5. Since length can't be negative, we know that: l = 8.5

First, we need to use the given information to set up an equation for the length and width of the credit card. We know that the width w is 3 centimeters shorter than the length l, so we can write:

w = l - 3

We also know that the area of the credit card is 46.75 square centimeters, which can be expressed as:

A = lw = 46.75

Now we can use these equations to solve for the length and width. Substituting the first equation into the second equation, we get:

(l - 3)l = 46.75

Expanding the left side, we get:

l^2 - 3l = 46.75

Rearranging and factoring, we get:

(l - 8.5)(l + 5.5) = 0

So the length of the credit card is either l = 8.5 or l = -5.5. Since length can't be negative, we know that:

l = 8.5

Using the first equation, we can then find the width:

w = l - 3 = 8.5 - 3 = 5.5

Now we can find the perimeter by adding up the four sides of the credit card:

P = 2l + 2w = 2(8.5) + 2(5.5) = 17 + 11 = 28

So the perimeter is 28 centimeters.

To solve this problem, we'll first use the given information to find the width (w) and length (l) of the credit card. Then, we'll calculate the perimeter using the formula: Perimeter = 2 * (length + width).

Given that the width (w) is 3 centimeters shorter than the length (l), we can express this as:

w = l - 3

We are also given the area of the credit card, which is 46.75 square centimeters. The area can be calculated as:

Area = length * width
46.75 = l * (l - 3)

Now, let's solve for l:

46.75 = l^2 - 3l
l^2 - 3l - 46.75 = 0

Solving this quadratic equation, we get:

l ≈ 7.25 cm

Now that we have the length, we can find the width:

w = l - 3
w = 7.25 - 3
w ≈ 4.25 cm

Finally, we can calculate the perimeter using the formula:

Perimeter = 2 * (length + width)
Perimeter = 2 * (7.25 + 4.25)
Perimeter ≈ 23 cm

So, the perimeter of the credit card is approximately 23 centimeters.

Visit here to learn more about Perimeter  : https://brainly.com/question/6465134
#SPJ11

A plane is flying at an elevation of feet. It is within sight of the airport and the pilot finds that the angle of depression to the airport is 24 degree. Find the distance between the plane and the airport. Find the distance between a point on the ground directly below the plane and the airport.

Answers

The distance between a point on the ground directly below the plane and the airport is about 23,221.1 feet.

Let's call the distance between the plane and the airport "x" and the height of the plane "h".

From the problem statement, we know that the angle of depression from the plane to the airport is 24 degrees. This means that if we draw a straight line from the plane to the airport, the angle between that line and the horizontal ground is 24 degrees.

We can use trigonometry to relate this angle to the distance "x" and the height "h". Specifically, we can use the tangent function, which relates the opposite side (height) to the adjacent side (distance) of a right triangle:

tan(24 degrees) = h/x

We want to solve for "x", so we can rearrange this equation to isolate "x":

x = h / tan(24 degrees)

We don't know the value of "h", but we can use the fact that the plane is at a certain elevation to find it. Let's say the elevation is "e" (in feet). Then:

h = e + 5280 feet

(The extra 5280 feet comes from the fact that the elevation is measured above sea level, while the airport is on the ground.)

Substituting this expression for "h" into our equation for "x", we get:

x = (e + 5280) / tan(24 degrees)

So, to find the distance between the plane and the airport, we need to know the elevation of the plane. Let's say it's 10,000 feet:

x = (10,000 + 5280) / tan(24 degrees) = 23,667.8 feet (rounded to one decimal place)

So the distance between the plane and the airport is about 23,667.8 feet.

To find the distance between a point on the ground directly below the plane and the airport, we can use the same triangle, but this time we're interested in a different side. Let's call this distance "d".

We can see that the angle between the line from the point on the ground to the airport and the horizontal is also 24 degrees. This is because the angle of depression is the same whether you're looking down from the plane or up from the ground.

Using trigonometry again, we can relate this angle to the distance "d" and the height "e":

tan(24 degrees) = e/d

Rearranging to solve for "d", we get:

d = e / tan(24 degrees) = 10,000 / tan(24 degrees) = 23,221.1 feet (rounded to one decimal place)

for such more question on  distance

https://brainly.com/question/12356021

#SPJ11

2. ABCD is a rhombus. If AC=8cm and BD=12cm, find the perimeter of the rhombus.​

Answers

The perimeter of the Rhombus is 28.8 cm.

What is a Rhombus?

Rhombus is a type of quadrilateral parallelogram whose all sides are equal and diagonals intersect each other at 90 degrees.

How to determine this

When the length of the diagonals of a rhombus is known, we find the side length of the rhombus.

When AC = 8 cm

BD = 12 cm

Using the formula

Perimeter = [tex]2\sqrt{AC^{2} + BD^{2} }[/tex]

P =[tex]2\sqrt{8^{2} + 12^{2} }[/tex]

P = [tex]2\sqrt{64 + 144 }[/tex]

P =[tex]2\sqrt{208}[/tex]

P = 2 * 14.42

P = 28.84 cm

Therefore, the perimeter of the Rhombus is 28.84 cm

Read more about Rhombus

https://brainly.com/question/31019167

#SPJ1

You start driving north for 6 miles turn right and drive east for another 19 miles

Answers

The distance frοm the starting point to the end of driving will be equal to 19.9 miles.

What is displacement?

The shortest path an οbject can take to get from one place to another is referred tο as "displacement". Tο put it simply, it is regarded to be the mοdification of the object's locatiοn. It is a vector quantity because of its magnitude and direction.

As per the given informatiοn in the question,

Start driving north fοr 6 miles then turn right and ride for 19 miles.

So the displacement frοm the starting point by Pythagoras' theorem will be:

h² = 6² + 19²

h = √36 + 361

h = 19.9 miles.

Therefοre, the distance from the starting point will be 19.9 miles.

To knοw more about displacement:

brainly.com/question/11934397

#SPJ4

Complete Question

You start driving nοrth for 6 miles, turn right, and drive east for another 19 miles. At the end οf driving, what is your straight line distance from your starting point? Round to the nearest tenth of a mile.​

The probability that a student will receive a state grant is 0.32, while the probability that a student will be awarded a federal grant is 0.45. If whether a student receives one grant is not influenced by whether the student receives the other, what is the probability of a student receiving both grants

Answers

The probability of a student winning both grants is 0.144, or 14.4%, is the response.

The likelihood that a student will be awarded both funds is determined by dividing the likelihood of earning a state grant by the likelihood of receiving a federal grant.

The formula P(A and B) = P(A) x P(B) can be used to determine the likelihood of two independent events occurring simultaneously. In this instance, event A has a 0.32 likelihood of winning a state award, but event B has a 0.45 probability of receiving a federal grant. Since the two occurrences are separate, we can use the following formula to determine the likelihood of both happening simultaneously:

Upon obtaining both awards, P(receiving both grants) = P(state grant) x P(federal grant) = 0.32 x 0.45 = 0.144

Therefore , The likelihood that a student will receive both grants is 0.144, or 14.4%.

To know more about probability visit:

brainly.com/question/30034780

#SPJ11

A histogram of blood alcohol concentrations in fatal accidents shows that BACs are highly skewed right. Explain why a large sample size is needed to construct a confidence interval for the mean BAC of fatal crashes with a positive BAC.

Answers

A large sample size is needed to construct a confidence interval for the mean BAC of fatal crashes with a positive BAC because it allows for a better approximation of a normal distribution according to the Central Limit Theorem, reduces the margin of error, and minimizes the impact of outliers in a highly skewed right distribution.

To understand why a large sample size is needed to construct a confidence interval for the mean BAC of fatal crashes with a positive BAC, especially when the histogram of blood alcohol concentrations is highly skewed right.

A histogram of blood alcohol concentrations (BACs) in fatal accidents that is highly skewed right indicates that most of the data points are concentrated on the lower end of the scale, with fewer data points extending to the higher BAC levels. When constructing a confidence interval for the mean BAC of fatal crashes with a positive BAC, a large sample size is necessary for the following reasons:

1. Central Limit Theorem: The Central Limit Theorem (CLT) states that the distribution of sample means approaches a normal distribution as the sample size increases, regardless of the shape of the population distribution. A larger sample size allows for a better approximation of a normal distribution, which is essential for constructing an accurate confidence interval.

2. Decreased Margin of Error: A larger sample size reduces the margin of error in the confidence interval, leading to a more precise estimate of the true population mean. As sample size increases, the standard error of the sample mean decreases, which narrows the confidence interval.

3. Minimizing the Impact of Outliers: In a highly skewed right distribution, there may be extreme values (outliers) on the higher end of the BAC scale. A larger sample size helps to minimize the impact of these outliers on the mean and the confidence interval, leading to a more accurate representation of the true population mean.

To learn more about confidence interval, refer here:

https://brainly.com/question/24131141#

#SPJ11

By changing to polar coordinates, evaluate the double integral {eq}\iint_{D} (x^2 + y^2)^\frac{3}{2} \, \mathrm{d}x \ \mathrm{d}y {/eq}, where {eq}D {/eq} is the disk {eq}x^2 + y^2\leq 36 {/eq}.

Answers

The expression inside the integral, we get {eq}r^3 \sqrt{r^2} = r^{\frac{7}{2}} {/eq}. Evaluating the integral, we get:{eq}\int_{0}^{2\pi} \int_{0}^{6} r^3 \sqrt{r^2} \, \mathrm{d}r \, \mathrm{d}\theta = \int_{0}^{2\pi} \left[\frac{2}{9}r^{\frac{9}{2}}\right]_{0}^{6} \, \mathrm{d}\theta = \frac{2}{9}(6^{\frac{9}{2}}-0) \int_{0}^{2\pi} \mathrm{d}\theta = \boxed{432\pi} {/eq}

To change to polar coordinates, we need to express {eq}x {/eq} and {eq}y {/eq} in terms of {eq}r {/eq} and {eq}\theta {/eq}. Using the conversion formulas, we have {eq}x = r\cos{\theta} {/eq} and {eq}y = r\sin{\theta} {/eq}. The limits of integration also change to reflect the new coordinate system. In polar coordinates, the disk {eq}x^2 + y^2\leq 36 {/eq} becomes {eq}0\leq r\leq 6 {/eq} and {eq}0\leq \theta\leq 2\pi {/eq}. Substituting these values, we get:

{eq}\iint_{D} (x^2 + y^2)^\frac{3}{2} \, \mathrm{d}x \ \mathrm{d}y = \int_{0}^{2\pi} \int_{0}^{6} r^3 \sqrt{r^2} \, \mathrm{d}r \, \mathrm{d}\theta {/eq}

Know more about integral here:

https://brainly.com/question/18125359

#SPJ11

Suppose the series has radius of convergence and the series has radius of convergence . What is the radius of convergence of the series

Answers

The radius of convergence of the series obtained by adding them term by term will be R = min(R1, R2).

If we have two power series:

∑an(x − c)n and ∑bn(x − c)n,

with radii of convergence R1 and R2 respectively, then we can define a new power series by adding these two series term by term:

∑cn(x − c)n = ∑an(x − c)n + ∑bn(x − c)n.

The radius of convergence of the new series will be at least as large as the smaller of R1 and R2, i.e.,

R ≥ min(R1, R2).

In other words, the radius of convergence of the new series will be the minimum of the radii of convergence of the original series.

So, in your case, if you have two power series with radii of convergence R1 and R2, then the radius of convergence of the series obtained by adding them term by term will be

R = min(R1, R2).

for such more question on radius

https://brainly.com/question/29127882

#SPJ11

A committee of four is to be randomly selected from a group of seven teachers and eight students. Determine the probability that the committee will consist of two teachers and two students. Write the answer as a fraction in lowest terms.

Answers

The probability that the committee will consist of two teachers and two students is 28/65.

To determine the probability that the committee will consist of two teachers and two students, we need to first find the total number of ways to select four people from the group of 15:

Total number of ways = C(15,4) = 15! / (4!11!) = 1365

Next, we need to find the number of ways to select two teachers and two students:

Number of ways = C(7,2) * C(8,2) = (7! / (2!5!)) * (8! / (2!6!)) = 21 * 28 = 588

Finally, we can find the probability by dividing the number of ways to select two teachers and two students by the total number of ways:

Probability = 588/1365 = 28/65

To learn more about probability click on,

https://brainly.com/question/28980137

#SPJ1

Find dX/dt. x = 4(1 -1)e^3t + 2(2 1)e^-2t dX/dt =?

Answers

The derivative dX/dt is -4e^-2t.

To find dX/dt for the given function, we need to differentiate it with respect to t. Here's the function:

x = 4(1 - 1)e^3t + 2(2 + 1)e^-2t

Since the first term (1-1) is equal to 0, the function simplifies to:

x = 2(3)e^-2t

Now, differentiate the function with respect to t:

dX/dt = -4e^-2t

Know more about derivative here;

https://brainly.com/question/30365299

#SPJ11

When an ice cream shop was founded, it made 22 different flavors of ice cream. If you had a choice of having a single flavor of ice cream in a cone, a cup, or a sundae, how many different desserts could you have

Answers

There are 275 different desserts at this ice cream shop.

If the ice cream shop made 22 different flavors of ice cream, you would have 22 choices for a single flavor in a cone or a cup. For a sundae, you could choose a combination of two or more flavors. Let's assume you choose two flavors for your sundae.

You would have 22 options for the first flavor and 21 options for the second flavor since you can't repeat the same flavor.

So, the total number of different desserts you could have is:
22 (single flavor in a cone) + 22 (single flavor in a cup) +[tex]22 (\frac{21}{2} )[/tex] (two flavors in a sundae)
= 22 + 22 + 231
= 275

Therefore, you could have 275 different desserts at this ice cream shop.

To know more about "Combination" refer here:

https://brainly.com/question/20211959#

#SPJ11

Which fractions have a least common denominator of 48?​

Answers

The equivalent Fractions with the LCD

2/3 = 32/481/16 = 3/481/8 = 6/48

LCD = 48 so its D. 16

How to solve

Rewriting input as fractions if necessary:

2/3, 1/16, 1/8

For the denominators (3, 16, 8) the least common multiple (LCM) is 48.

LCM(3, 16, 8)

Therefore, the least common denominator (LCD) is 48.

Calculations to rewrite the original inputs as equivalent fractions with the LCD:

2/3 = 2/3 × 16/16 = 32/48

1/16 = 1/16 × 3/3 = 3/48

1/8 = 1/8 × 6/6 = 6/48

Read more about fractions here:

https://brainly.com/question/78672

#SPJ1

What number is missing in the fractions to have a LCD of 48? 2/3, 1/?, 1/8 A.2 B.6 C.12 D.16

A satellite dish is shaped like a paraboloid of revolution. This means that it can be formed by rotating a parabola around its axis of symmetry. The receiver is to be located at the focus. If the dish is 56 feet across at its opening and 7 feet deep at its center, where should the receiver be placed

Answers

The receiver should be placed approximately 0.0625 feet above the center of the dish, along its axis of symmetry, to ensure optimal signal reception.

A satellite dish shaped like a paraboloid of revolution is formed by rotating a parabola around its axis of symmetry. The receiver needs to be located at the focus of the parabola to ensure optimal signal reception.

In this case, the dish is 56 feet wide at its opening and 7 feet deep at its center.

To determine the receiver's location, we need to first find the equation of the parabola. The standard equation for a parabola is y = 4ax, where "a" is the distance from the vertex to the focus. Given the dimensions, the vertex of the parabola is at the origin (0, 0), and the dish opening extends from -28 to 28 feet on the x-axis. Since the dish is 7 feet deep, the point (28, 7) lies on the parabola.

Using the point (28, 7) and the equation y = 4ax, we can solve for the value of "a":
7 = 4a(28)

Dividing both sides by 112, we get:
a = 7/112 ≈ 0.0625

Now that we have the value of "a", we can find the focus. The focus is located at the point (0, a), which in this case is approximately (0, 0.0625).

To learn more about parabola click here

brainly.com/question/4074088

#SPJ11

In a certain community, 40 percent of the families own a dog and 25 percent of the families that own a dog also own a cat. It is also known that 50 percent of the families own a cat. 1 (a) What is the probability that a randomly selected family owns both a dog and a cat

Answers

From the conditional probability formula, probability that a randomly selected family owns both a dog and a cat in a community is equals to the 0.125.

A conditional probability is the probability of a certain event happening when another event is happening. Let us consider the events A and B. The conditional probability of occurrence of A when B already occurred, using formula, [tex] P(A|B )= \frac{ P( A and B)}{P(B)}[/tex]. Now, we have a certain community, Let us consider two events

A : the families with own a dog

B : the families with own a cat.

Probability that the families with own a dog, P(A) = 40% = 0.40

Probability that the families with own a cat P(B) = 50% = 0.50

Probability that the families that own a dog also own a cat, P( A| B) = 25%

= 0.25

The probability that a randomly selected family owns both a dog and a cat, P( A and B) or P(A∩B). Using the conditional probability formula, [tex]P(A|B )= \frac{ P(A∩B)}{0.50} = 0.25 [/tex]

=> P(A∩B) = 0.50 × 0.25 = 0.125

Hence, required value is 0.125.

For more information about conditional probability, visit :

https://brainly.com/question/16456973

#SPJ4

Among American women aged 20 to 29 years old, 10% are less than 60.8 inches tall, 80% are between 60.8 and 67.6 inches tall, and 10% are more than 67.6 inches tall. Assume heights for women in their 20s are normally distributed. what is the standard deviation

Answers

The standard deviation for American women aged 20 to 29 years old is 3.81 inches.

To find the standard deviation, we need to use the formula for a normal distribution:

z = (x - μ) / σ

where z is the z-score, x is the height, μ is the mean height, and σ is the standard deviation.

We know that 80% of women in their 20s are between 60.8 and 67.6 inches tall, which means that the range of z-scores is from -1.28 to 0.84 (using a standard normal table).

We can set up two equations using the z-score formula:

-1.28 = (60.8 - μ) / σ

0.84 = (67.6 - μ) / σ

Solving for σ in either equation gives us the standard deviation:

σ = (67.6 - μ) / 0.84

Plugging this into the first equation, we can solve for μ:

-1.28 = (60.8 - μ) / ((67.6 - μ) / 0.84)

-1.28(67.6 - μ) = 60.8 - μ

-86.048 + 1.28μ = 60.8 - μ

2.28μ = 146.848

μ = 64.4

Therefore, the standard deviation is:

σ = (67.6 - 64.4) / 0.84 = 3.81

To know more about standard deviation, refer to the link below:

https://brainly.com/question/23907081#

#SPJ11

x -intercepts of the graph of the function f(x)=x2+5x−12 .

Answers

The value of x -intercepts of the graph of the function are,

⇒ x = 1.75 and x = - 6.75

We have to given that;

Function is,

⇒ f (x) = x² + 5x - 12

Now, We can simplify for x - intercept by substitutive f (x) = 0;

⇒ f (x) = x² + 5x - 12

⇒ 0 = x² + 5x - 12

⇒ x = - 5 ± √(5)² - 4×1×- 12 / 2

⇒ x = - 5 ± √25 + 48 / 2

⇒ x = - 5 ± √73 / 2

⇒ x = - 5 ± 8.5 / 2

⇒ x = (- 5 + 8.5)/2

⇒ x = 3.5 / 2

⇒ x = 1.75

⇒ x = (- 5 - 8.5) / 2

⇒ x = - 13.5 / 2

⇒ x = - 6.75

Thus, The value of x -intercepts of the graph of the function are,

⇒ x = 1.75 and x = - 6.75

Learn more about the function visit:

https://brainly.com/question/11624077

#SPJ1

One pair of students ended up with a significant difference from expected, as their coin tosses resulted in a majority of albino children (10 of the 16). Explain why this may have occurred

Answers

It appears that the pair of students experienced an unexpected outcome in their coin toss experiment, resulting in a majority of albino children (10 out of 16). This could have occurred due to reasons such as random variation, bias, sample size, or genetics of parents.

The occurrence of a majority of albino children from a pair of students' coin tosses may be due to chance or random variation. The probability of getting a specific outcome from a coin toss is 50/50, which means that getting a majority of heads or tails is possible but not guaranteed. One possible explanation for this occurrence is that the students' coin tosses were not truly random. There may have been some bias in their method or in the coin itself, which could have influenced the outcome.

Another possibility is that the sample size was too small to accurately reflect the expected outcome. With only 16 coin tosses, it is possible to get a result that is different from the expected outcome purely by chance. It is also important to consider that albino traits are inherited genetically, and the chance of having albino children may be influenced by the genetics of the parents. If the pair of students had unknowingly selected coins that were biased towards one side, it may have resulted in a majority of albino children due to chance or genetic factors.

Overall, the occurrence of a majority of albino children from a pair of students' coin tosses may be due to various factors such as chance, bias, sample size, or genetic factors. Further investigation and replication of the experiment may be necessary to determine the underlying cause of the deviation from the expected outcome.

Know more about genetic factors here:

https://brainly.com/question/26497428

#SPJ11

Consider the following series (ln(n)) 11 72 721 What test(s) is(are) applicable to test the convergence or divergence of this series. Ingegral test Ratio test Roottest Geometric series test (6) Does this series converge? O No Yes

Answers

The  answer is: No, the series does not converge.

To test the convergence or divergence of the series ∑(ln(n)), we can use the integral test.

Let f(x) = ln(x), where x ≥ 1. Then f(x) is a continuous, positive, and decreasing function for x ≥ 1. Therefore, we can use the integral test to determine whether the series converges or diverges by comparing it to the improper integral:

∫[1, ∞] ln(x) dx

We can evaluate this integral using integration by parts:

∫[1, ∞] ln(x) dx = x ln(x) - x |[1, ∞]
= ∞ - 0 - (1 - 0)
= ∞ - 1

Since the integral diverges, we conclude that the series ∑(ln(n)) also diverges.

Therefore, the answer is: No, the series does not converge.

Visit to know more about Converge :-

brainly.com/question/29698841

#SPJ11

What type of relationship does the scatterplot have below?

Answers

The type of relationship that the scatterplot have is a negative association

What type of relationship does the scatterplot have

From the question, we have the following parameters that can be used in our computation:

The scatter plot

On the scatter plot, we can see that

As the x values increaseThe y values appear to reduceThe points follow an approximate linear path

This means that tthe association is approximately linear

Also, the relationship is a negative association

Read more about scatter plot at

https://brainly.com/question/16920148

#SPJ1

In the 6/53 lottery game, a player picks six numbers from 1 to 53. How many different choices does the player have if repetition is not allowed

Answers

There are 20,358,520 different choices for the player in the 6/53 lottery game if repetition is not allowed.

If repetition is not allowed, then the player can choose any of the 53

numbers for the first number, any of the remaining 52 numbers for the

second number, any of the remaining 51 numbers for the third number, and

so on.

Therefore, the number of different choices the player has is:

53 × 52 × 51 × 50 × 49 × 48 = 20,358,520

So there are 20,358,520 different choices for the player in the 6/53 lottery

game if repetition is not allowed.

for such more question on lottery game

https://brainly.com/question/24920139

#SPJ11

In how many ways can we select a committee of four Republicans, three Democrats, and two Independents from a group of 10 distinct Republicans, 12 distinct Democrats, and 4 distinct Independents

Answers

There are 277,200 ways to select a committee of four Republicans, three Democrats, and two Independents from the given group.

To select a committee of four Republicans, three Democrats, and two Independents from a group of 10 distinct Republicans, 12 distinct Democrats, and 4 distinct Independents, you can use combinations.

For Republicans: C(10,4) = 10! / (4!(10-4)!) = 210 ways
For Democrats: C(12,3) = 12! / (3!(12-3)!) = 220 ways
For Independents: C(4,2) = 4! / (2!(4-2)!) = 6 ways

Now, multiply the combinations together to get the total ways:
210 (Republicans) × 220 (Democrats) × 6 (Independents) = 277,200 ways

Know more about combinations here:

https://brainly.com/question/31596715

#SPJ11

10) Seven people sit in a circle and begin counting clockwise starting from 1.Each person in the group is keeping track of the numbers she is saying (e.g. 1,8, 15...) If they continue in this way, counting on and on, until they reach 1000, which person will get to say the last number

Answers

The person who gets to say the last number, 1000, will be Person 6.

In this scenario, we have seven people sitting in a circle and counting clockwise. The goal is to determine which person will say the last number when they reach 1000. To solve this problem, we can use the concept of modular arithmetic.

When dividing 1000 by the total number of people (7), we get a quotient of 142 and a remainder of 6 (1000 = 142*7 + 6). This means that after completing 142 full rounds of counting, the group will have reached the number 994 (142*7). In the next round, they will continue counting from 995 to 1000.

Since the remainder is 6, it indicates that the last number (1000) will be spoken by the person sitting 6 positions after the first person in the circle (clockwise). In other words, Person 1 says numbers 1, 8, 15, and so on, while Person 6 will say 6, 13, 20, and so on.


To learn more about modular arithmetic click here

brainly.com/question/29022762

#SPJ11

Analysis of Variance assumes that Multiple select question. population variances are equal. sample sizes are equal. the response variable Y is categorical. populations are normally distributed.

Answers

Population variances are equal, sample sizes are equal, and populations are normally distributed.

The Multiple Select Question "Analysis of Variance assumes that" are:

population variances are equal

sample sizes are equal

populations are normally distributed

Explanation:

Analysis of Variance (ANOVA) is a statistical method used to test the equality of means between two or more groups.

To perform ANOVA, certain assumptions need to be met:

The populations from which the samples are drawn have equal variances (homoscedasticity)

The sample sizes are equal (or approximately equal) across all groups

The populations are normally distributed

The observations within each group are independent and identically distributed (IID)

The response variable in ANOVA is continuous, not categorical.

ANOVA is used to compare means between two or more groups, so the response variable needs to be a continuous variable that can be measured and compared across the groups.

For similar questions on Population

https://brainly.com/question/31243583

#SPJ11

How do the telomere lengths of parents with DKC compare with the telomere lengths of their children with DKC

Answers

Dyskeratosis congenita (DKC) is a rare inherited disorder that affects the production and maintenance of telomeres. Telomeres are the protective caps on the ends of chromosomes that shorten as cells divide and age.

In people with DKC, telomeres are shorter than normal, which can lead to premature aging, bone marrow failure, and an increased risk of cancer.

When both parents have DKC, all of their children inherit the disorder and are also born with shorter telomeres. The exact length of telomeres can vary from person to person, even within families. However, the telomere lengths of children with DKC tend to be shorter than those of their parents with DKC because the telomeres are progressively shortened with each generation.

Moreover, the rate of telomere shortening can also be influenced by factors such as environmental exposures, stress, and lifestyle choices, which may contribute to variations in telomere lengths between parents and children with DKC.

Learn more about DKC here:- brainly.com/question/12222553

#SPJ11

Other Questions
404 people are chosen from a large population that is half women. The claim is that the people were randomly chosen, but we suspect that they might not be randomly choosing the people and instead be biased against women. How likely is it that the sample has only 182 women or fewer, if the people were really randomly chosen Can somebody explain this and answer it please. Two square sheets of cardboard used for making book covers differ in area by 72 square inches. An edge of the larger square is 2 inches greater than an edge of the smaller square. Find the length (in inches) of an edge of the smaller square. The sculpting of rock formations by blowing sand is an example of ____.a.oxidationb.abrasionc.corrosiond.dissolution Why is it important for a cell to perform a check at the end of each cycle before moving on to the next phase A team is looking at its process from the perspective of the material flow (from the supplier to customer) and information flow (from customer to supplier). What Lean technique are they using Determine whether each situation represents a proportional or a non-proportional relationship.Select one answer in each row.SituationThe total number of text messages sent if 4 were already sent and 6messages are sent per dayThe number of characters in a text message if each word contains 6charactersThe number of minutes it takes to enter a text message at 50characters per minuteThe time it takes to send a text message if it takes 30 seconds toopen the app and the sender enters 1 character per second. The electric field has a magnitude of 3V/m at a distance of .6m from a point charge. What is the charge The major concern involved in architectural acoustics is how A. indirect sound reflections change sound quality. B. direct sound reflections change sound quality. C. indirect sound reflections affect VAS. D. direct sound reflections affects VAS Consider the following bonds: Bond B Coupon Rate (annual payments) 0.0% 0.0% 4.2% 8.3% Maturity (years) 15 10 15 10 D Which of the bonds A to D is most sensitive to a 1% drop in interest rates from 6.2% to 5.2%? Which bond is least sensitive? Bond is most sensitive. (Select from the drop-down menu.) The suggested strategies for mind mapping include: a. All of the answer choices b. Use key words only c. Put the main concept in the center d. Create links Negotiating _____ agreements in parent-child transactions requiring decision making and/or disciplinary actions is a strategy for strengthening parental coalitions. In the Readers-Writers Problem, we want to allow a reader and a writer to be in their critical sections for the shared data at the same time. Group of answer choices True False Which one of the following has the highest standard molar entropy, S', at 25 C? a. NaF ) b. NaCl () c. NaBr d. Nal () e. They all have the same value. A research study on a group of children with autism will compare treatment delivered by parents at home to treatment delivered by teachers at school. If the study finds that the treatment delivered at school is more effective, which item is the BEST example of a confounding variable A nursing student is listing the different aspects of obtaining informed consent from clients. Which point mentioned by the nursing student needs correction Although he is aware that Greg's performance over the past year has not been quite up to standards, Jimmy, his superior, left the impression on Greg after a performance appraisal interview that he is doing a great job and to keep up the good work. Jimmy has a problem with how do i solve this i dont get it How far should the lens be from the film (or in a present-day digital camera, the CCD chip) in order to focus an object that is infinitely far away (namely the incoming light rays are parallel with the principal axis of the system). (b) How far should the lens be from the film to focus an object at a distance Kirsten has spent $1500 purchasing and repairing an old boat which she expects to sell for $1800 once the repairs are complete. Kirsten discovers that, in addition to the $1500 he has already spent, she needs to make an additional repair, which will cost another $600, in order to make the boat worth $1800 to potential buyers. However, she can sell the boat as it is now to a second buyer for $1300. What should she do?