If you want to estimate the mean height of all the .students at a university, which one of the following sampling strategies would be best? Why? Note that none of the methods are true simple random samplesi. Measure the heights of 50 students found in the gym during basketball intramurals ii. Measure the heights of all engineering majors. iii. Measure the heights of the students selected by choosing the first name on each page of the cam pus phone book.

Answer: 18.84

Step-by-step explanation: just multiply 3.14 by the radius

the solution of the given derivative will be y = k/2(1±√(1-4h/rk))

What is derivative?

A function's varied rate of change with respect to an independent variable is referred to as a derivative. When there is a variable quantity and the rate of change is irregular, the derivative is most frequently utilised. The derivative is used to assess how sensitive a dependent variable is to an independent variable (independent variable). In mathematics, a quantity's instantaneous rate of change with respect to another is referred to as its derivative. Investigating the fluctuating nature of an amount is beneficial.

dy/dt = 0

-r/k y²+ry-h=0

y = k/2(1±√(1-4h/rk))

Hence the solution of the given derivative will be y = k/2(1±√(1-4h/rk))

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The implicit cost of Jack's education is $77,000, which is the amount of foregone income he gave up in order to attend college.

The implicit cost of Jack's education refers to the opportunity cost or the foregone income he gave up in order to attend college. It is a measure of the value of the next best alternative that he had to sacrifice.

First, let's find the total cost of tuition and books. Jack pays $17,000 per year, so the total cost will be 17,000 * 4 = $68,000 over 4 years of college.

Next, let's find the total cost of rent and food. Jack pays $600 per month for rent and $400 per month for food, so the total cost will be 600 + 400 = $1,000 per month. Over 4 years of college, this comes to 1,000 * 12 * 4 = $48,000.

Finally, Jack also pays $125 per month for on-campus parking, so the total cost will be 125 * 12 * 4 = $6,000.

Putting it all together, we can write the equation for the implicit cost of Jack's education as follows:

Implicit Cost = Foregone Income - Total Cost of Tuition, Rent, Food and Parking

Implicit Cost = 45,000 - (68,000 + 48,000 + 6,000)

Implicit Cost = 45,000 - 122,000

Implicit Cost = -77,000

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Answer:

y = - [tex]\frac{3}{4}[/tex] x + 15

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

here slope m = - [tex]\frac{3}{4}[/tex] , then

y = - [tex]\frac{3}{4}[/tex] x + c ← is the partial equation

to find c substitute (8, 9 ) into the partial equation

9 = - [tex]\frac{3}{4}[/tex] (8) + c = - 6 + c ( add 6 to both sides )

15 = c

y = - [tex]\frac{3}{4}[/tex] x + 15 ← equation of line

The function h as a composition of two functions f and g are;

[tex]f(x)=\sqrt[7]{x} \\\\ g(x)=x^6-4[/tex]

Function is a type of relation, or rule, that maps one input to specific single output.

In mathematics, a function is an expression, rule, or law that describes the relationship between one variable (the independent variable) and another variable (the dependent variable) (the dependent variable). In mathematics and the physical sciences, functions are indispensable for formulating physical relationships.

Functions are formed by composing two or more functions in a way that one's output is another's input are called composite functions. They are also called function of functions.

From the information given we can deduce that the functions are:

[tex](f\circ g)(x)=\sqrt[7]{x^6-4}[/tex]

The simplification of the function gives the individual function as;

[tex]f(x)=\sqrt[7]{x} \\\\ g(x)=x^6-4[/tex]

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Answer:

h(x) = [tex]\frac{1}{2}[/tex] x - [tex]\frac{1}{2}[/tex]

Step-by-step explanation:

let y = f(x) and rearrange making x the subject , that is

y = 2x + 1 ( subtract 1 from both sides )

y - 1 = 2x ( divide both sides by 2 )

[tex]\frac{y-1}{2}[/tex] = x

change y back to x with x the inverse function h(x)

h(x) = [tex]\frac{x-1}{2}[/tex] = [tex]\frac{1}{2}[/tex] x - [tex]\frac{1}{2}[/tex]

Answer:

1/3 or 0.33333

Step-by-step explanation:

To find the product of two fractions, multiply numerators and denominators separately.

You get 2340/7020 which simplifies to 1/3.

Hope that helps.

Answer:

1/3

Step-by-step explanation:

Step 1) 12/13 x 12/15 = 156/195

Step 2) 156/195 x 15/36 = 2340/7020

Step 3) Simplify to get 1/3

Mona always brings fabric samples with her when she holds client meetings. She likes to use them to help clients understand how her designs will look and

how different fabrics will go together.

Another reason that Mona MOST LIKELY brings along fabric samples is a) They allow the client to see and feel the texture of the fabric.

From the illustration above Mona brings product samples when she meets in a business meeting with her customers.

This is a step to provide a clearer picture to potential customers so they can see Mona's products in more detail.

So the most appropriate choice is option A, namely Mona's reason is also to provide potential consumers with experience and knowledge about the texture of the fabrics sold by Mona.

This can also help to improve the quality of business relationships.

Providing samples of new products will further enhance the business relationship between us and customers. Impress them with what we have given them. Give them something special on birthdays or other special days for them, that way your business bond and them will get stronger and closer.

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It can reject the null hypothesis at a significance level of 0.05 and conclude that the mean sprint speed of the team is significantly different from the national athletics mean speed of 12 seconds.

The formula for the standard error of the mean is:

SE = s / √(n)

where s is the sample standard deviation and n is the sample size.

The null hypothesis for a two-tailed test would be:

H0: The mean sprint speed of the team is equal to 12 seconds.

The alternative hypothesis would be:

Ha: The mean sprint speed of the team is not equal to 12 seconds.

To test this hypothesis, we need to calculate the standard error of the mean for the team.

Using the data provided, we can calculate the sample mean, sample standard deviation, and sample size as follows:

x = (8+12+9+7+8+10+9+11+13.5+8.5+10.5+9.5+11.5+12.5+9.5+10.5) / 16 = 10

s = √(1/(n-1) × ((8-10)² + (12-10)² + ... + (10.5-10)²)) = 1.717

n = 16

Therefore, the standard error of the mean is:

SE = 1.717 / √(16) = 0.429

To test the hypothesis, we can calculate the t-statistic using the formula:

t = (x - μ) / (SE)

where μ is the hypothesized population mean.

Plugging in the values, we get:

t = (10.0625 - 12) / 0.429 = -4.389

Using a t-table with 15 degrees of freedom (n-1), we can find that the probability of obtaining a t-value of -4.389 or more extreme is less than 0.01.

This means that we can reject the null hypothesis at a significance level of 0.05, and conclude that the mean sprint speed of the team is significantly different from the national athletics mean speed of 12 seconds.

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Step-by-step explanation:

The average intensity of radiation between 10 meters and 50 meters from the source can be found using the following formula:

Average Intensity = (1 / (50 - 10)) * (Integral of r(x) from x=10 to x=50)

Using the formula for r(x), the integral of r(x) between 10 and 50 can be found as:

Integral of r(x) = -k * ln(x) evaluated at x = 50 and x = 10

Therefore, the average intensity of radiation between 10 and 50 meters from the source is given by:

Average Intensity = (1 / (50 - 10)) * (-k * (ln(50) - ln(10)))

This simplifies to:

Average Intensity = (1 / 40) * (-k * ln(5))

This is equivalent to choice c.

Average Intensity = 1/40 (-k/50 + k/10).

Answer:

number 2 or B

Step-by-step explanation:

Since the partnership amount between Bob and Dan is a distinct legal entity, Dan's malpractice claim cannot encumber Bob's assets.

Both Bob and Dan are physicians who work at the same hospital. They established a partnership, which is a distinct legal entity, because they are partners in the company. This indicates that the partnership's assets and liabilities are separate from Bob and Dan's personal assets and liabilities. Therefore, since the action is against the company and not Bob personally, it will not have any effect on Bob's assets if Dan is sued for malpractice. Any obligations resulting from the malpractice lawsuit will be covered by the partnership, and Bob's assets are secure. One of the numerous benefits of creating a partnership is this.

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A graph which represents the function f(x) = -|x - 2| - 1 include the following:

In Mathematics, an absolute value function is a type of function that is composed of an algebraic expression, which is placed within absolute value symbols and it typically measures the distance of a point on the x-axis to the x-origin (0) of a cartesian coordinate (graph).

Next, we would use an online graphing calculator to plot the given absolute value function f(x) = -|x - 2| - 1 as shown in the graph attached below.

By observing critically the graph (see attachment), the two ordered pairs (points) that fit on its axes include the following:

Ordered pair = (2, -1).

Ordered pair = (0, -3).

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The height of the hyperbolic vase is 5.12 * 2 = 10.24 inches.

What is a hyperbola?

A hyperbola is a particular kind of smooth curve that lies in a plane and is classified by its geometric characteristics or by equations for which it is the solution set. A hyperbola is made up of two mirror images of one another that resemble two infinite bows. These two sections are known as connected components or branches. A plane and both halves of a double cone connect to form a hyperbola, which is an open curve with two branches. The hyperbola will be symmetrical regardless of whether the plane is perpendicular to the cone's axis or not.

The eccentricity formula for a hyperbola is

[tex]e = \sqrt{1+\frac{b^2}{a^2} }[/tex]

e = 2.5

Given width at the narrowest point is 4 inches.

So the  value of a from the below figure is

a = ±2

So we can find b from the above eccentricity formula

2.5  = [tex]\sqrt{1+\frac{b^2}{2^2} }[/tex]

6.25 = 1 + b²/4

b²/4 = 5.25

b² = 21

b = ±4.6

So the equation of the hyperbola is

[tex]\frac{x^2}{a^2} - \frac{y^2}{b^2} = 1[/tex]

[tex]\frac{x^2}{4} - \frac{y^2}{21} = 1[/tex]

Now we are asked to find the height of the vase

The width at the top is 6 inches.

So take x = 3

Then we can find y from the above equation

[tex]\frac{3^2}{4} - \frac{y^2}{21} = 1[/tex]

y² = 26.25

y = 5.12 inches

Therefore the height of the hyperbolic vase is 5.12 * 2 = 10.24 inches.

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In the triangle ABC the line segment bisecting AC is the median, i.e. BD.

What are triangles?

Triangles are a particular sort of polygon in geometry that have three sides and three vertices. Three straight sides make up the two-dimensional figure shown here. An example of a 3-sided polygon is a triangle. The total of a triangle's three angles equals 180 degrees. One plane completely encloses the triangle.

The triangle ABC is given.

In Δ ABC, the line segment AC is bisected, so -

AD = CD

The line segment from a vertex to the middle of the other side is what is meant by a median. When the vertex is an angle in an equilateral triangle or the non-congruent angle of an isosceles triangle, it is also an angle bisector.

Since line segment BD bisects AC.

Therefore, the median is BD.

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The p-value from the data is 0.5289

To test whether the average score improvement of the GRE prep company's students is different than 100, we can use a two-sided t-test.

First, we need to set up our null and alternative hypotheses:

Null hypothesis (H0): The true mean score improvement of the GRE prep company's students is equal to 100.

Alternative hypothesis (Ha): The true mean score improvement of the GRE prep company's students is different than 100.

We will use a significance level of α = 0.05, which means we will reject the null hypothesis if the p-value is less than 0.05.

Next, we can calculate the sample mean and sample standard deviation of the data:

Sample mean (x) = 98.16

Sample standard deviation (s) = 8.88

We have a small sample size (n = 10) and the population standard deviation is unknown, so we will use a t-test. The t-statistic for a two-sided test is given by:

t = (x - μ) / (s / sqrt(n))

where μ is the hypothesized population mean (in this case, 100).

Substituting the values, we get:

t = (98.16 - 100) / (8.88 / sqrt(10)) = -0.655

Using a t-table with 9 degrees of freedom (n-1), we find that the two-tailed p-value for t = -0.842 is 0.5289.

Since the p-value (0.5289) is greater than the significance level (0.05), we fail to reject the null hypothesis. We do not have sufficient evidence to conclude that the true mean score improvement of the GRE prep company's students is different than 100.

Therefore, based on the given data, we cannot reject the claim of the GRE prep company that the average score improvement of their students is equal to 100.

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The number of food items they need to have on hand is:

Nachos = 1165

Hamburgers = 1700

Chicken strips = 50

The percentage is calculated by dividing the required value by the total value and multiplying by 100.

Example:

Required percentage value = a

total value = b

Percentage = a/b x 100

Example:

50% = 50/100 = 1/2

25% = 25/100 = 1/4

20% = 20/100 = 1/5

10% = 10/100 = 1/10

We have,

Number of fans surveyed = 250

Nachos= 58,

Hamburgers = 85

Chicken strips = 33

The percentage of each item.

Nachos= 58/250 x 100 = 23.2%

Hamburgers = 85/250 x 100 = 34%

Chicken strips = 33/250 x 100 = 13.2%

Now,

If,

Number of fans surveyed = 5000

Nachos = 23.2% of 5000 = 23.3/100 x 5000 = 1165

Hamburgers = 34% of 5000 = 34/100 x 5000 = 1700

Chicken strips = 13.2% of 5000 = 13.2/100 x 5000 = 50

Thus,,

Nachos = 1165

Hamburgers = 1700

Chicken strips = 50

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The unknown angle in the hexagon is as follows:

m∠1 = 148 degrees

Erica is making plans to build a fence on her property line. Using the map let's find the angle m∠1 as follows:

Therefore, the angle m∠1 is one of the angle in the hexagon.

Therefore, the sum of angles in a hexagon is as follows:

sum of angles in hexagon = 180(n - 2)

where

sum of angles in hexagon = 180(6 - 2)

sum of angles in hexagon = 720 degrees

Therefore,

180 - 45 - 27 = 108 degrees

180 - 108 = 72 degrees

Hence,

m∠1 = 720 - 142 - 148 - 80 - 72 - 130

m∠1 = 148 degrees

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As a result, the median is 13. The data has a minimum value of 11 and a maximum value of 17.

The median is the value in the center of a data collection, which means that 50% of the data points have a value less than or equal to the median, and 50% of the data points have a value greater than or equal to the median. For a small data collection, count the number of data points (n) and arrange them in increasing order.

Here,

(a)(i) The median of the data can be found by ordering the data and finding the middle value. In this case, the data has 16 values, so the median is the average of the 8th and 9th values when the data is ordered. The median is therefore 13.

(ii) The minimum value of the data is 11 and the maximum value is 17.

(b) The box-and-whisker diagram is a graphical representation of the distribution of a set of data. It consists of a box, whiskers and dots that show the distribution of the data.

The box represents the interquartile range (IQR), which is the range of the middle 50% of the data. The IQR is calculated as the difference between the upper quartile (Q3) and the lower quartile (Q1). In this case, the IQR is 15 - 12.5 = 2.5.

The lower edge of the box is Q1 and the upper edge of the box is Q3. The line inside the box is the median.

Whiskers are drawn to the minimum and maximum values, excluding outliers. Outliers are values that are significantly different from the rest of the data. In this case, there are no outliers.

Dots may be used to represent individual data points.

Here's what the box-and-whisker diagram would look like for this data:

| |

| |

|_13|

12.5 15

The median is therefore 13. The minimum value of the data is 11 and the maximum value is 17.

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Explanation:

For any parallelogram, the adjacent angles add to 180.

T+S = 180

(4x+1)+(3x+4) = 180

7x+5 = 180

7x = 180-5

7x = 175

x = 175/7

x = 25

Now we can determine angles T and S.

Notice that they add to 101+79 = 180 to confirm the correct x value, and correct angle measures.

For any parallelogram, the opposite angles are congruent. This allows us to say:

The detail that best supports the inference that the auto manufacturing industry supports green solutions is -

"Pyrolysis generates low-cost energy that can be used in the automobile manufacturing industry".

The pyrolysis process is the thermal decomposition of materials at elevated temperatures, often in an inert atmosphere.

Given is that an engineer at an environmentally minded technology company has come up with a process to convert tire waste from the automobile industry into clean energy.

The detail that best supports the inference that the auto manufacturing industry supports green solutions is -

"Pyrolysis generates low-cost energy that can be used in the automobile manufacturing industry".

Therefore, the detail that best supports the inference that the auto manufacturing industry supports green solutions is -

"Pyrolysis generates low-cost energy that can be used in the automobile manufacturing industry".

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a. An example of a countable collection of disjoint open intervals is the collection of intervals (0, 1/n), where n is a positive integer. This collection of intervals is countable because it can be put in one-to-one correspondence with the positive integers.

In mathematics, a one-to-one correspondence between two sets is a bijective function that maps every element of one set to exactly one element of the other set, and vice versa.

b. An example of an uncountable collection of disjoint open intervals is the collection of intervals (x, x + 1/n), where x is a real number and n is a positive integer. This collection of intervals is uncountable because it can be put in one-to-one correspondence with the real numbers. To see this, note that for any real number x, we can find a positive integer n such that 1/n is smaller than x. Then, the interval (x, x + 1/n) corresponds to x.

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Answer:

The width of the rectangle is approximately 8.904 yards, and the length of the rectangle is 24.71 yards.

Step-by-step explanation:

Let x be the width of the rectangle, then the length of the rectangle is 4x - 18.

The area of the rectangle is x * (4x - 18) = 630, so we can solve for x:

x * (4x - 18) = 630

Expanding and rearranging the equation:

4x^2 - 18x - 630 = 0

Using the quadratic formula, we can find the solutions for x:

x = (-b ± √(b^2 - 4ac)) / (2a)

where a = 4, b = -18, and c = -630.

x = (18 ± √(18^2 - 4 * 4 * -630)) / (2 * 4)

x = (18 ± √(18^2 + 2520)) / 8

x = (18 ± √(324 + 2520)) / 8

x = (18 ± √2844) / 8

x = (18 ± 53.23) / 8

Since width can't be negative, x must be positive, so:

x = (18 + 53.23) / 8

x = 71.23 / 8

x = 8.904

The length of the rectangle is 4 * 8.904 - 18 = 24.71 yards.

The IV pump should be set at 25ml/hr.

Given is that 40 gm of magnesium sulfate is diluted in 1000 ml LR. After an initial loading dose, the nurse is to infuse a maintenance dose of 2 gm/hour.

Now, 40 gm of magnesium is diluted in 1000 ml.

So, 1 gm of magnesium will be present in (1000/40) ml = 25 ml.

Now, for 2 gm/hr, the pump should be set at 25 ml/hr.

Therefore, the IV pump should be set at 25ml/hr.

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The minimum number of books she must sell to make a profit is 2.

In mathematics, the gain from any business operation is referred to as the profit. Every time a shopkeeper sells a product, his goal is to make a profit by getting something from the customer. Basically, he sells the item for more money than it costs.

Given that Anna estimates her revenue equation as R = 6.56x

And her cost equation as C = 10.063 + 1.09x.

To get profit revenue is greater than cost, i.e.

R>C

6.56x > 10.063 + 1.09x

subtract 1.09x from both sides

6.56x - 1.09x > 10.063

5.47x > 10.063

divide both sides by 5.47

x > 10.063/ 5.47

x > 1.84

So the minimum number of books she must sell to make a profit is 2.

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Answer:

LX = WI

I = L

A = G

W = X

I = L

LAX = WIG

The value of variables are,

⇒ a = 3100

⇒ b = 0.7

An exponential function's curve is created by a pattern of data called exponential decay, which exhibits higher decreases over time.

The exponential decay function:

Aₙ = A₀(1-r)ˣ, where y = Final amount, A₀ = Initial amount, r = Rate of decay in decimal form, x = Time.

Given that;

Wellington Elementary School bought a printer one year ago for $3,100.

And, Today, the value of the printer has decreased to $2,170 and is expected to continue decreasing each year.

Now, An equation in the required exponential form,

A = A₀(1 - r)ˣ

Substituting the values,

A = 3100(1-r)ˣ.

To find the r:

2170 = 3100(1-r)

r = 0.3

So, The equation is,

Aₙ = 3100(1-0.3)ˣ.

y = 3100(0.7)ˣ.

Therefore, The value of variables are,

⇒ a = 3100

⇒ b = 0.7

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