Two angles of an irregular polygon are 100⁰
each and each of the remaining angles is 1300.
Find the number of sides of the polygon.

Answer:

[tex]a_{n}[/tex] = 20 - 12n

Step-by-step explanation:

the explicit rule for an arithmetic sequence is

[tex]a_{n}[/tex] = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

a recursive rule has the form

[tex]a_{n}[/tex] = [tex]a_{n-1}[/tex] + d

given recursive rule

[tex]a_{n}[/tex] = [tex]a_{n-1}[/tex] - 12 : a₁ = 8

then a₁ = 8 and d = - 12

explicit rule is therefore

[tex]a_{n}[/tex] = 8 - 12(n - 1) = 8 - 12n + 12 = 20 - 12n

The order from the greatest number of triangles to the smallest is: Condition A, Condition B, Condition C.

According to the Triangle Inequality Theorem, any two triangle sides' sums must be bigger than the length of the third side.

The triangle inequality theorem can be used to determine the order of the greatest to smallest triangle.

Condition A: Under this condition, we have two sides with lengths 5 and 6, and their angle is 50°. Using these requirements, we may create two separate triangles since 5 + 6 = 11, which is more than the third side.

Condition B: This condition results in a right triangle with a third angle that is 90° and two sharp angles that measure 40° and 50°. According to the Pythagorean theorem, the triangle's two legs must be 30 and 40 inches long, respectively, meaning that the hypotenuse must be 50 inches long. We can only create one triangle as a result.

Condition C: This condition provides us with three sides that are 4, 5, and 9 lengths long. Any two sides must have a length total larger than the third side in order for a triangle to be formed. The three sides provided, however, do not satisfy this since 4 + 5 = 9. Hence, under these circumstances, a triangle cannot be formed.

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Number of cylindrical cans of paint does he need to paint 75 ​ornaments is 20.

The total area that the cylinder's curved surface and round bases enclose is referred to as its surface area. The cylinder's total surface area consists of the curving surface as well as the areas of the two bases, each of which is shaped like a circle. A cylinder is a 3D solid object made up of two circular bases connected by a curving face.

Surface Area of Cylinder = 2πrh+2πr²

where , r is radius of cylinder=4.6cm

H is height of cylinder=2*6.5cm=13cm

A=2×π×4.6×13+2×π×4.6²≈508.68668cm²

Total Number of cans of paint needed to paint 75 ​ornaments=75×508.68668

/1900=20.

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[tex]\cfrac{22\pi }{3}\implies \cfrac{(3)(7)\pi +\pi }{3}\implies 7\pi +\cfrac{\pi }{3}\implies 6\pi +\pi +\cfrac{\pi }{3}[/tex]

so the angle is really 3 revolutions plus another π plus a little bit more.  Check the picture below.

[tex](\stackrel{x_1}{1}~,~\stackrel{y_1}{3})\hspace{10em} \stackrel{slope}{m} ~=~ \cfrac{5}{4} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{3}=\stackrel{m}{ \cfrac{5}{4}}(x-\stackrel{x_1}{1}) \\\\\\ y-3=\cfrac{5}{4}x-\cfrac{5}{4}\implies y=\cfrac{5}{4}x-\cfrac{5}{4}+3\implies {\Large \begin{array}{llll} y=\cfrac{5}{4}x+\cfrac{7}{4} \end{array}}[/tex]

The value of x is 8 inches.

To find the value of x, we can use the property of similar triangles that states that the corresponding sides of similar triangles are in proportion. Specifically, we can set up the proportion:

4/10 = x/20

We can then cross-multiply to get:

4 * 20 = 10 * x

Simplifying this equation gives us:

80 = 10x

Dividing both sides by 10, we get:

x = 8

Therefore, the value of x is 8 inches.

In summary, we used the property of similar triangles and set up a proportion involving the corresponding sides of the two triangles. By cross-multiplying and simplifying, we were able to find the value of x.

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Complete Question:

Enter your answer and show all the steps that you use to solve this problem in the space provided.

On the left triangle, the shorter side is labeled 4 inches and the longer side is labeled 10 inches. On the right triangle, the shorter side is labeled x inches and the longer side is labeled 20 inches.

The two triangles above are similar. Find the value of x. Be sure to explain your steps.

Answer:

  C.  0.75 s

Step-by-step explanation:

Given a squirrel's height is defined by H(x) = -16x² +24x +15, you want to know the value of x when the height is a maximum.

The x-coordinate of the vertex of y = ax² +bx +c is x=-b/(2a). For the given function, we have a=-16 and b=24, so the x-value at the vertex is ...

  x = -b/(2a) = -24/(2(-16)) = 24/32 = 3/4

  x = 0.75

The squirrel reaches its maximum height 0.75 seconds after leaping.

The probability that an 18-year-old man selected at random is between 70 and 72 inches tall is approximately 0.0793 and the probability that the mean height of a sample of eight 18-year-old men is between 70 and 72 inches is approximately 0.9057 and the probability in part (b) is much higher because the standard deviation is smaller for the x distribution.

What do you mean by normally distributed data?

In statistics, a normal distribution is a probability distribution of a continuous random variable. It is also known as a Gaussian distribution, named after the mathematician Carl Friedrich Gauss. The normal distribution is a symmetric, bell-shaped curve that is defined by its mean and standard deviation.

Data that is normally distributed follows the pattern of the normal distribution curve. In a normal distribution, the majority of the data is clustered around the mean, with progressively fewer data points further away from the mean. The mean, median, and mode are all the same in a perfectly normal distribution.

Calculating the given probabilities :
(a) The probability that an 18-year-old man selected at random is between 70 and 72 inches tall can be found by standardizing the values and using the standard normal distribution table. First, we find the z-scores for 70 and 72 inches:

[tex]z-1 = (70 - 71) / 5 = -0.2[/tex]

[tex]z-2 = (72 - 71) / 5 = 0.2[/tex]

Then, we use the table to find the area between these two z-scores:

[tex]P(-0.2 < Z < 0.2) = 0.0793[/tex]

So the probability that an 18-year-old man selected at random is between 70 and 72 inches tall is approximately 0.0793.

(b) The mean height of a sample of eight 18-year-old men can be considered a random variable with a normal distribution. The mean of this distribution will still be 71 inches, but the standard deviation will be smaller, equal to the population standard deviation divided by the square root of the sample size:

[tex]\sigma_x = \sigma / \sqrt{n} = 5 / \sqrt{8} \approx 1.7678[/tex]

To find the probability that the sample mean height is between 70 and 72 inches, we standardize the values using the sample standard deviation:

[tex]z_1 = (70 - 71) / (5 / \sqrt{8}) \approx -1.7889[/tex]

[tex]z_2 = (72 - 71) / (5 / \sqrt{8}) \approx 1.7889[/tex]

Then, we use the standard normal distribution table to find the area between these two z-scores:

[tex]P(-1.7889 < Z < 1.7889) \approx 0.9057[/tex]

So the probability that the mean height of a sample of eight 18-year-old men is between 70 and 72 inches is approximately 0.9057.

(c) The probability in part (b) is much higher because the standard deviation is smaller for the x distribution. When we take a sample of eight individuals, the variability in their heights is reduced compared to the variability in the population as a whole. This reduction in variability results in a narrower distribution of sample means, with less probability in the tails and more probability around the mean. As a result, it becomes more likely that the sample mean falls within a given interval, such as between 70 and 72 inches.

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Answer:

In geometry, postulates are statements that are accepted as true without proof. The three postulates for congruent triangles are ASA, SSS, and SAS. These postulates are used to prove that two triangles are congruent.

ASA Postulate:

ASA stands for "Angle, Side, Angle." This postulate states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.

Visual example:

In the above image, ΔABC and ΔDEF have ∠A ≅ ∠D, ∠B ≅ ∠E, and AB ≅ DE. Therefore, we can conclude that ΔABC ≅ ΔDEF by ASA postulate.

SSS Postulate:

SSS stands for "Side, Side, Side." This postulate states that if the three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent.

Visual example:

In the above image, ΔABC and ΔDEF have AB ≅ DE, BC ≅ EF, and AC ≅ DF. Therefore, we can conclude that ΔABC ≅ ΔDEF by SSS postulate.

SAS Postulate:

SAS stands for "Side, Angle, Side." This postulate states that if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent.

Visual example:

In the above image, ΔABC and ΔDEF have AB ≅ DE, BC ≅ EF, and ∠B ≅ ∠E. Therefore, we can conclude that ΔABC ≅ ΔDEF by SAS postulate.

Overall, the ASA, SSS, and SAS postulates are important tools in proving the congruence of triangles in geometry. They allow us to make logical deductions about the properties of triangles based on their corresponding angles and sides.

Answer:

They are different because ASA means that the two triangles have two angles and the side between the angles congruent. SAS means that two sides and the angle in between them are congruent

Step-by-step explanation:

and sss If all the three sides of one triangle are equivalent to the corresponding three sides of the second triangle, then the two triangles are said to be congruent by SSS rule.

Answer: x = 8.7

Step-by-step explanation:

You are given the reference angle: 60°, the hypotenuse and the leg of which to find.

X is opposite in reference to 60° and you are given the hypotenuse.

Sine works with the hypotenuse and the opposite: sin∅ = opp/hyp

sin(60°) = x/10

To figure out x, you must transpose, to make x the subject. X is being divided by 10, so to undo that you must multiply, and what you do to one side, you must do to the next to balance the equation.

10 x sin(60) = x/10 x 10

= X = sin(60) x 10

sin(60) = 0.866

X = 0.866 x 10

X = 8.66

You can round off to one decimal place or leave the answer as is.

X = 8.7 (1 d.p)

The probability of the chosen point uniformly at random from within a unit circle is 1/π.

Suppose that a point is chosen uniformly at random from within a unit circle.

Let (x,y) denote the coordinates of the randomly chosen point.

The coordinates of the randomly chosen point (x, y) on the unit circle can be given by:

x = cos(θ)y = sin(θ) where θ is the angle between the positive x-axis and the line segment connecting the origin to the point (x, y).

The probability density function for this situation is given by:

p(x,y) = {1/(πr^2)} for 0≤x^2 + y^2 ≤ r^2 and p(x,y) = 0 elsewhere

where r is the radius of the unit circle. For this situation, r = 1.

So, we can say that the probability of selecting a point in a unit circle is given by:

Probability (0≤x^2 + y^2 ≤ 1) = 1/(π*1^2) = 1/π.

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Answer:

Step-by-step explanation:

To solve this problem, we need to determine the number of ways to choose two objects of different types from the given sets.

We can start by computing the number of ways to select two objects from each of the three sets, and then add these numbers together. Since we must choose two different types, we cannot choose two objects from the same set.

The number of ways to choose two cups is:

C(5,2) = 5! / (2! * (5-2)!) = 10

The number of ways to choose two saucers is:

C(4,2) = 4! / (2! * (4-2)!) = 6

The number of ways to choose two spoons is:

C(2,2) = 1

Since we must choose two different types, we need to multiply the number of ways to choose two objects from different sets. There are three sets to choose from, so we need to choose two of them as follows:

3 choices of sets * number of ways to choose two objects from each set = 3 * (10 + 6 + 1) = 51

Therefore, there are 51 ways to buy two objects of different types from the given sets of cups, saucers, and spoons.

Showing solidarity and discipline in protecting our environment requires collective effort and a willingness to change our behavior and attitudes towards the environment. Here are some ways in which we can show solidarity and discipline in protecting our environment:

Educate ourselves and others about environmental issues and their impact on our planet and communities.

Reduce, reuse, and recycle waste by properly disposing of garbage, avoiding single-use plastics, and using eco-friendly products.

Conserve resources like water and energy by taking shorter showers, turning off lights and electronics when not in use, and using public transportation or carpooling.

Plant trees, flowers, and other vegetation to improve air quality, provide shade, and prevent erosion.

Support environmental causes and organizations through volunteering, donating, and spreading awareness.

By taking these actions, we can demonstrate our solidarity and discipline in protecting our environment, and inspire others to join us in making a positive impact on the planet.

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The standard error of the mean is defined as the standard deviation of the sampling distribution of all potential sample means drawn from a population.

The standard error is also known as the standard deviation of the sampling distribution.

The standard deviation of the population is known as the population standard deviation.

The population standard deviation is an estimate of the amount of variation or dispersion of the values in the population.

It represents the average distance of the values from the mean of the population.

The standard deviation of the sampling distribution of all possible sample means (for a fixed sample size n) from a population is lower than the standard deviation of the population.

The standard deviation of the sampling distribution of all possible sample means is a measure of the variation of the sample means around the population mean.

The sample means are less variable than the individual observations in the population; therefore, the standard deviation of the sample means is lower than the standard deviation of the population.

In general, the standard error is given by:

$$SE = \frac{{{\sigma _p}}}{{\sqrt n }}$$

where, σp represents the population standard deviation and n represents the sample size.

The standard deviation of the sampling distribution is lower than the population standard deviation.

The standard deviation of the sampling distribution is dependent on the sample size n.

As the sample size increases, the standard deviation of the sampling distribution decreases.

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The experimental likelihood that probability the incoming train will be fully occupied is 0.56, or 56%.

It's simple to calculate the likelihood of a simple event occurring by adding the probabilities together. Your overall odds to win something, for instance, are 10% + 25% = 35% if your chances of winning $10 or $20, respectively, are 10% and 25%, respectively.

In this instance, 14 of the 25 arriving trains were completely full.

The following train's likelihood of being full is determined by the proportion of full trains to all other trains.

14/25 are in favor of the upcoming train being fully loaded.

The likelihood that the following train will have every seat taken is 0.56, or 56%.

It either happens or it doesn't, according to the four significant rules of probability. The chance of an event occurring when the probability of it not occurring is put together is always 1. The same principles apply to empirical probability.

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If two trapezoids have respective surface areas of  [tex]432cm^2 and 48cm^2[/tex], their similarity ratio is 3:1.

The ratio of the areas of similar figures is the square of the ratio of their corresponding side lengths.

Let's denote the ratio of similarity between the two trapezoids by "k".

The area of the first trapezoid is [tex]432 cm^2[/tex], and the area of the second trapezoid is [tex]48 cm^2[/tex].

Therefore, we can set up the equation:

(k * side length of first trapezoid)^2 / (k * side length of second trapezoid)^2 = 432/48

Simplifying the right-hand side of the equation gives:

(k * side length of first trapezoid)^2 / (k * side length of second trapezoid)^2 = 9

We can simplify the left-hand side of the equation by canceling out the "k" terms:

(side length of first trapezoid)^2 / (side length of second trapezoid)^2 = 9

Taking the square root of both sides gives:

(side length of first trapezoid) / (side length of second trapezoid) = 3

Therefore, the ratio of the corresponding side lengths of the two trapezoids is 3:1. Since the ratio of similarity is the square of the ratio of corresponding side lengths, we have:

k = (side length of first trapezoid) / (side length of second trapezoid) = 3/1 = 3

So, the ratio of similarity between the two trapezoids is 3:1.

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Angle APD is opposite to angle APC. Angle APD is supplementary (adds up to 180 degrees) to angle CPB.

In geometry, two angles are called supplementary angles if the sum of their measures is equal to 180 degrees. In other words, if two angles are placed adjacent to each other so that they share a common vertex and a common side, and the non-common sides form a straight line, then these angles are supplementary.

For example, if angle A and angle B are supplementary, then their measures are such that A + B = 180 degrees. Therefore, if angle A measures 120 degrees, then angle B measures 60 degrees.

It is important to note that supplementary angles do not have to be adjacent or even on the same line. As long as the sum of their measures equals 180 degrees, they are considered supplementary.

When two lines AB and CD intersect at point P, the angles formed are related in several ways. Specifically:

Angle APD is opposite to angle APC.

Angle APD is supplementary (adds up to 180 degrees) to angle CPB.

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The length οf line FG is 12 cm, If  Figure EFGH is a parallelοgram.

A parallelοgram is a type οf quadrilateral with twο pairs οf parallel sides. The οppοsite sides οf a parallelοgram are equal in length and parallel tο each οther.

Since EFGH is a parallelοgram, we knοw that the οppοsite sides are parallel and equal in length. Therefοre, the length οf line FG is equal tο the length οf line EH.

We can find the length οf EH by using the Pythagοrean theοrem οn right triangle EFG:

[tex]EF^2 + FG^2 = EG^2[/tex]

Since EF = 5 cm, EG = 13 cm, and angle FEG is a right angle (as οppοsite angles in a parallelοgram are equal), we can sοlve fοr FG:

[tex]FG^2 = EG^2 - EF^2[/tex]

[tex]FG^2 = 13^2 - 5^2[/tex]

[tex]FG^2 = 144[/tex]

[tex]FG = \sqrt{(144)[/tex]

[tex]FG = 12 cm[/tex]

Therefοre, the length οf line FG is 12 cm.

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Key takeaways of Cross Tab and Scatter plots (Reflecting on visual models):

We can develop insights and knowledge about our world by manipulating and visualizing data, in particular by finding patterns. Cross Tab is a powerful method of data analysis that helps to compare the relationship between two or more variables. The scatter plot is one of the most effective tools to visualize two-variable data.

The main takeaways from cross-tabulation and scatter plots include:

In conclusion, both cross-tabulation and scatter plots are effective tools for data analysis that can help to identify patterns and relationships between variables. When investigating two columns of data we can observe patterns of different values that move together (are correlated). We cannot know for certain the cause of the correlation.

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Using pythagoras' theorem in the right-angled triangle

A right-angled triangle is a polygon with 3 sides in which one angle is a right angle

Now, since we have 3 triangles, using Pythagoras' theorem in all three triangles, we have

h² + (12 - x)² = 12² - 6² (1)

Also, h² + x² = 6²  (2)

So, h² + (12 - x)² = 12² - 6²

h² + (12 - x)² = 144 - 36

h² + (12 - x)² = 108  (3)

From equation (2), h² = 36 - x²

Substituting this into equation (3), we have that

h² + (12 - x)² = 108  (3)

36 - x² + (12 - x)² = 108  (3)

Expanding the brackets, we have that

36 - x² + 144 - 24x + x² = 108

36 + 144 - 24x = 108

180 - 24x = 108

-24x = 108 - 180

-24x = -72

x = -72/-24

x = 3

Since  h² = 36 - x²

h = √(36 - x²)

So, substituting the value of x = 3 into the equation, we have that

h = √(36 - x²)

h = √(36 - 3²)

h = √(36 - 9)

h = √27

h = 3√3

So,

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The decay function d(x) is an exponential function with an initial value of 850, a decay factor of 0.94, and a rate of decay that increases as x increases. The function has a horizontal asymptote at y=0, and its domain is all real numbers while its range is (0, 850].

Exponential Decay: The function d(x) is an exponential function because it has a constant base (0.94) raised to a variable exponent (x).

Initial Value: The initial value of the function d(x) is 850, which represents the value of the function when x=0.

Decay Factor: The decay factor of the function d(x) is 0.94, which is less than 1. This means that as x increases, the function decreases and approaches zero, but never reaches zero.

Rate of Decay: The rate of decay of the function d(x) is determined by the value of the decay factor, which is 0.94. The closer the decay factor is to 1, the slower the rate of decay. Conversely, the closer the decay factor is to 0, the faster the rate of decay.

Asymptote: The function d(x) has a horizontal asymptote at y=0. This means that as x becomes very large, the function approaches but never touches the x-axis.

Domain and Range: The domain of the function d(x) is all real numbers, and the range is (0, 850]. This means that the function outputs a positive value less than or equal to 850, but never outputs zero.

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Answer:49

Step-by-step explanation:

The given differential equation is y' - (y/x) = y²Where y is a function of x.

The solution of the given differential equation is given below Option (e) y = (1/c) (x - x ln x)

y' - (y/x) = y²

We first check whether the given differential equation is a Bernoulli differential equation. It is not a Bernoulli differential equation. Hence we cannot directly solve the given differential equation.

Using the integrating factor method, we get

Integration factor, I(x) = e^(∫(1/x)dx) = e^(ln x) = x

1. Multiplying the integrating factor to the given differential equation, we get

x y' - y = x y²

This is a linear differential equation with variable coefficients.

The standard form of the linear differential equation with variable coefficients is given below:

y' + p(x) y = q(x) where p(x) = -1/x and q(x) = x y²

2. Multiplying the integrating factor, we get x y' - y = x y²

3. Multiplying the integrating factor x on both sides, we get x² y' - xy = x³ y²

4. Differentiating both sides with respect to x, we get

2xy' + x² y'' - y - 2x y' = 3x² y y'

On simplifying, we getx² y'' + 3x y' - 2y = 0

This is a homogeneous differential equation. We substitute y = ux, where u is a function of x. On substituting we getx² u'' + 2x u' = 0

5. On simplifying, we get u' = -c/x²

6. On integrating, we get u = c/x + d where c and d are arbitrary constants.

Substituting u = y/x, we get y/x = c/x + d

Hence the solution of the given differential equation is y = c - x ln x

where c = 1

The correct option is (e).Option (e) y = (1/c) (x - x ln x)

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The variable is not initialized, it will have a default value associated with its data type.

To print the sum of the greatest two of the three values in the given code segment, the code must be corrected by introducing curly braces that help enclose the second if statement such that it can execute properly in cases where it is necessary. If the second if statement is not enclosed in curly braces, then the else statement will execute the code that is present inside of it. Thus, only a will be assigned to low. The corrected code segment should be:if (a > b && b > c) {low = c;}if (a > b && c > b) {low = b;} else {low = a;}System.out.println(a + b + c - low);For a better understanding of this code, let's discuss variables, declared, and initialized.What are variables?A variable is a memory location that stores a data value. Variables in Java are declared by assigning a data type to them. The value stored in the memory location can be changed throughout the program execution.What is initialization in Java?Initialization in Java refers to assigning a specific value to a variable during its declaration. The value may be provided by the user, entered via keyboard, or assigned to a constant. If a variable is not initialized, it will have a default value associated with its data type.

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The mean, variance, and standard deviation for n = 295 and p = 0.21 by using binomial distribution are

61.95, 48.8125, and 6.988, respectively.

The binomial distribution, which is a type of probability distribution, is used to calculate the probability of a certain number of successes (or failures) in a given number of trials. The mean, variance, and standard deviation of a binomial distribution can be calculated using the following formulas:
Mean (μ) = np
Variance (σ²) = npq
Standard deviation (σ) = √(npq)
Where n is the number of trials, p is the probability of success in a single trial, and q is the probability of failure in a single trial (q = 1 - p).

Part 1 out of 4: n = 295, p = 0.21
Using the formulas above, we can calculate the mean, variance, and standard deviation for this binomial distribution.
Mean (μ) = np

= 295 × 0.21 ⇒61.95
Variance (σ²) = npq

= 295 × 0.21 × 0.79 ⇒ 48.8125
Standard deviation (σ) = √(npq)

⇒ √(48.8125) = 6.988

Therefore, the mean, variance, and standard deviation for n = 295 and p = 0.21 are 61.95, 48.8125, and 6.988, respectively.

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Answer:

39.77 -> 39 or 40, depending on rounding

Step-by-step explanation:

Since 2002-1992 is 10. T would equal 10. At that point, it would be a gesture of plugging in 10 whereever you see a "t" and solve for both

Answer: I got 29

Step-by-step explanation:

You would plug in 4 in all the spots where the x's are and then solve the problem

Answer:

Step-by-step explanation:

9 - 9 : 9 : 9 - 9 : 9 =

9 - 1 : 9 - 1 =

9 - 1/9 - 1 =

8/9 - 1 =

(81 - 1 - 9)/9 =

71/9

The value of the angle m<L is 52 degrees

Following the side angle theorem of triangles, we have that the sum of the angles in a given triangle is equal or equivalent to 180 degrees.

From the information given, we have that;

Now, equate the angles to 180 degrees, we have;

m<J + m<K + m<L =180

substitute the values into the equation

8x + 6 + 2x + 2 + 4x + 4 = 180

collect the like terms, we have;

8x + 2x + 4x = 180 - 12

add or subtract the values

14x = 168

Make 'x' the subject

x = 12

For m<L = 4x + 4 = 4(12) + 4 = 52 degrees

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Answer:

A = 1600π cm²

Step-by-step explanation:

We are given that a circle's radius increases 4 cm every second.

We want to know how large the area of the circle is after 10 seconds.

We first need to find how large the radius will be.

We know the proportion of the rate increase / time; for every 1 second, the rate increases by 4 cm.

We can write this as a proportion:

[tex]\frac{4 cm}{1 s} = \frac{x}{10s}[/tex]

We can cross multiply to get:

4 cm * 10 s = x * 1 s

Divide both sides by 1 s

(4 cm * 10 s) / (1 s) = 40cm = x

So, after 10 seconds, the radius will be 40cm.

We aren't done yet though, remember that the question wants us to find the area of the circle.

The area can be calculated using the equation A = πr², where r is the radius.

We can substitute 40 as r in the equation to get:

A = πr² = π * (40)² = 1600π cm²