Suppose a simple random sample of 30 students from this district is selected. What is the probability that at least half of them have brown eyes? (Use technology. Round your answer to three decimal places.)

The 10th term of the geometric sequence whose common ratio is 1/3 and whose first term is 7 is [tex]\frac{7}{19683}[/tex].

What is  geometric sequence?

A unique kind of sequence is a geometric sequence. Every term in the series (apart from the first term) is multiplied by a fixed amount to determine the following term. In other words, we multiply the current phrase in the geometric sequence by a constant term (called the common ratio), and then divide the current term in the geometric sequence by the same common ratio to discover the previous term in the geometric sequence.

nth term of geometric series

a(n) = a(1) * r^(n-1)

You are given a(1) = 7, r = 1/3 and n = 10.

a(10) = 7 * 1/3^(10-1)

[tex]7\left(\frac{1}{3}\right)^{10-1}$$[/tex]

Apply exponent rule: [tex]$\left(\frac{a}{b}\right)^c=\frac{a^c}{b^c}$[/tex]

[tex]$$\begin{aligned}& \left(\frac{1}{3}\right)^{10-1}=\frac{1^{10-1}}{3^{10-1}} \\& =7 \times \frac{1^{10-1}}{3^{10-1}}\end{aligned}$$[/tex]

[tex]$$\begin{aligned}& 1^{10-1}=1 \\& =7 \times \frac{1}{3^{10-1}} \\& 3^{10-1}=19683 \\& =7 \times \frac{1}{19683}\end{aligned}$$[/tex]

Convert element to fraction: [tex]$\quad 7=\frac{7}{1}$[/tex]

[tex]=\frac{7}{1} \times \frac{1}{19683}$$[/tex]

Apply the fraction rule: [tex]$\frac{a}{b} \times \frac{c}{d}=\frac{a \times c}{b \times d}$[/tex]

[tex]=\frac{7 \times 1}{1 \times 19683}$$[/tex]

Multiply the numbers: [tex]$7 \times 1=7$[/tex]

[tex]=\frac{7}{1 \times 19683}$$[/tex]

Multiply the numbers: [tex]$1 \times 19683=19683$[/tex]

[tex]=\frac{7}{19683}[/tex]

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a. The inverse variation relationship between a and b can be expressed as a = k/b^2, where k is a constant. We are given that a is 1 when b is 3, so we can substitute these values into the equation to find k: 1 = k/(3^2). Solving for k, we get k = 9.

Substituting this value of k back into the equation a = k/b^2, we can find a when b is 5: a = 9/(5^2) = 9/25 = 0.36. Therefore, a is 0.36 when b is 5.

b. To find the distance it takes for a car traveling at 65 miles per hour to stop, we can use the equation for direct variation: d = kv^2, where d is the distance, v is the speed, and k is a constant. We are given that it takes 112 feet for a car traveling at 40 miles per hour to stop, so we can substitute these values into the equation to find k: 112 = k(40^2). Solving for k, we get k = 0.0056.

Substituting this value of k back into the equation d = kv^2, we can find the distance it takes for a car traveling at 65 miles per hour to stop: d = 0.0056(65^2) = 2256 feet. Therefore, it takes 2256 feet for a car traveling at 65 miles per hour to stop.

The salary corresponding to z=1 is $64587 if the average teacher's salary in a particular state is $54,137.

A Z-score is a metric that quantifies the connection between a value and the mean of a set of values. The Z-score is measured as the standard deviations from the mean. If the Z-score is 0, A data point's score is the same as the mean score. In statistics, a raw score's value that deviates or surpasses the mean of the phenomenon being observed or measured is referred to as the standard score. Raw scores above the mean are given positive standard scores, whilst raw values below the mean are given negative standard ratings.

The pay is 1 standard deviation above the mean, according to a z score of 1.

Therefore, the salary for a z-score of 1 is:

$54,137 + 1($10,450) = $64587

Therefore, the salary corresponding to z=1 is $64587

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Answer:

2x+3y = -15

Step-by-step explanation:

The linear equation written in the slope-intercept form is:

y = (-3/5)*x

The correct option is C.

A general linear equation is written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

Here we can see that the line crosses through the poin (0, 0), so the y-intercept is 0.

b = 0

y = a*x + 0

y = a*x

To find the value of a, we can use another point on the graph.

We can see that the linear equation passes through (5, - 3), replacing these values:

-3 = a*5

-3/5 = a

Then the linear equation is just:

y = (-3/5)*x

The correct option is C.

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Step-by-step explanation:

put the value of h(x) in the function like in the above figure.

According to the given information the dimensions of each of the roof is 12 feet.

The amount the three-dimensional space that's also occupied is measured in volume. To define it quantitatively, a variety of imperial either Us or metric system, in addition to SI-derived units such as the cubic meter but instead liter), are widely utilized. A symbiotic relationship exists between volume and length (cubed).

Mathematics refers to volume as the measurement of internal space in a specific 3D object. A fish tank, for instance, is three feet long, one foot broad, and two feet high. Expanding the length, that width, and the height results in the volume, which is equal to six when 3x1x2 is used. Consequently, the fish tank can hold 6 cubic feet of water.

According to the given picture

a = 18 ft,

b = 8ft,

c = 36ft and h = x

[tex]\begin{matrix}V=a\times b\times c+\frac{a\times h}{2}\times c\\\9072=18\times8\times36+\frac{18\times x}{2}\times36\\9072=5184+324\times x\\\x=12\\\end{matrix}[/tex]

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Answer: 15

Step-by-step explanation: I submitted 12 and that was wrong, answer is 15

Answer: 2

Step-by-step explanation:

Basketball player have to make 5 successful consecutive throws to make to raise her percent to 85%.

Percentage is a part of the whole number. It is denoted by % sign.

1 %= 1/100.

Given that,

Basketball player makes 12 out of 15 free throws she attempted.

The percentage of successful throws = (12/15)x100 = 75%

Let n consecutive free throws she has to make to increase the percentage of successful throws to 85%,

Implies that,

(12+n)/ (15+n) = 85/100

(12+n)/ (15+n) = 17 /20

240 + 20n = 255 + 17n

3n = 15

n = 5

Basketball player have to make 5 successful consecutive throws to make to raise her percent to 85%.

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Answer:

[tex](-3, 4)[/tex]

Step-by-step explanation:

The horizontal component is [tex]-3[/tex] and the vertical component is [tex]4[/tex]

The component (-3, 4) from the given vectors are shown ​in the graph.

Let A = v 1, v 2,..., v r be a collection of vectors from Rn. If r > 2 and at least one of the vectors in A can be expressed as a linear combination of the others, A is said to be linearly dependent. The rationale for this description is straightforward: at least one of the vectors is dependent (linearly) on the others. If no vector exists in A, the set is said to be linearly independent. It is also usual to state "the vectors are linearly dependent (or independent)" rather than "the set comprising these vectors is linearly dependent (or independent)."

We have been given that the graph in the question

Here v = -3i + 4j

This means the component (-3, 4) of the provided vectors.

Therefore, the required component (-3, 4) from the provided vectors are depicted ​in the graph.

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The value of x using Exterior Angle Theorem is 9.

What is the exterior angle of theorem?

Interior 2 angle = exterior angle

32° + (6x -2)° = 9x + 3

32° + 6x -2° = 9x + 3

30° - 3° = 9x - 6x

3x = 27°

x = 9

Hence, the value of x using Exterior Angle Theorem is 9.

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Answer:

5x^2

4x

-20x

Step-by-step explanation:

5x(x) = 5x^2

4(x)= 4x

5x(-4)= -20x

Answer: x=5

Step-by-step explanation:

4x+4-4=24-4

4x=20

x=5

[tex]~~~~~~ \textit{Continuously Compounding Interest Earned Amount} \\\\ A=Pe^{rt}\qquad \begin{cases} A=\textit{accumulated amount}\dotfill & \$5500\\ P=\textit{original amount deposited}\\ r=rate\to 5.5\%\to \frac{5.5}{100}\dotfill &0.055\\ t=years\dotfill &10 \end{cases} \\\\\\ 5500=Pe^{0.055\cdot 10} \implies \cfrac{5500}{e^{0.055\cdot 10}}=P\implies 3173.22\approx P[/tex]

Stephen's current average weekly net pay is $354.76. The van he wants to purchase has monthly payments of $325.00. the inequality that correctly shows the comparison between 15% of Stephen's average monthly net pay and the monthly van payment is  $212.86 ≤ $325.00

Information given in the question

Stephen's current average weekly net pay is $354.76

The van he wants to purchase has monthly payments of $325.00.

the inequality that compares 15% of Stephen's average monthly net pay and the monthly van payment = ?

A weekly pay of  $354.76 getting the monthly pay is

= 4 * $354.76

= $1419.04

15% of the monthly pay

= 0.15 * $1419.04

= 212.856

= $212.86

This amount is less than $325.00 which is monthly payment for the van hence  $212.86 ≤ $325.00

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Answer:

7/4

Step-by-step explanation:

The rate of change is the slope or the change in y over the change in x.

The equation to show how many miles Mario has left to run this month to reach his goal is C. m + 85 = 170; m = 85 miles.

An equation is the statement that illustrates the variables given. In this case, two or more components are taken into consideration to describe the scenario. It is vital to note that an equation is a mathematical statement

In this situation, Mario set a goal to run 170 miles this month to prepare for a marathon and far this month, he has run 85 miles.

Let the remaining miles be m.

This will be illustrated as:

m + 85 = 170

Collect like terms

m = 170 - 85

m = 85

In conclusion, the correct option is C

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The required solution of the given inequality is z ≤ 9.

Given that,
To determine the solution of the inequality −2(2z−3)≥2z+24.

Inequality can be defined as the relation of the equation containing the symbol of ( ≤, ≥, <, >) instead of the equal sign in an equation.

Here,
−2(2z−3)≥2z+24
-4z + 6 ≥ 2z + 24
-2z ≥ 18
z ≤ 9

Thus, the required solution of the given inequality is z ≤ 9.

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The function f : S--> T is not a one to one function

Given :

f : S --> T

S and T are finite sets with |S| > |T|

To proof : f is not one-one function

Let us assume for the sake of contradiction that f is one to one function

Let n and m be positive integers such that |S| = n and |T| = m.

Note that these integers need to exist as S and T are finite sets

n > m

Let S = {s1 , . . . , sn} and T = { t1 , . . . , tm}

Without loss of generality , we can assume that f(si) = ti , for i = 1, 2, 3 ....

as each element needs to have a unique image ( since , f is one to one ) and we can rename the element t1 , . . . , tm if the order of the elements didnt match up the images.

Since , n > m we have a term sm+1 while we do not have a term t m+1 .

This implies that sm+1 needs to have a same image as some sk

f(sm+1) = f(sk) = tk

However , f(sm+1) = f(sk) = tk is then in contradiction with the fact that f is one-to-one.

Since , we derive a contradiction our assumption that f is one-to-one is incorrect and thus f is not one-to-one

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Answer:

42.86%

Explanation:

First, we subtract the two numbers.

42 - 24 = 18

Now we divide this to the original number.

18 / 42 = 0.4285714286

Multiply by 100:

42.85714286

So, the percent increase is approximately 42.86%

The  simplest radical from BC = 2/3.

AC = 26 and BC = 10.

Therefore, BC = 26 - 10 = 14.

we need to find the simplest radical from BC = 14. A simple radical is a fraction with no common factors other than 1 and itself. The simplest radical from BC = 14 is 2/3

Simply put, simplifying a radical eliminates the need to find any further square roots, cube roots, fourth roots, etc. Additionally, it entails eliminating any radicals from a fraction's denominator.

The radical consists of three separate parts:

The Complete Question is :

AC = 26 and BC = 10   find the simplest radical from BC =

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The mean of the dataset increases and the standard deviation of the data set increases when the 7 is changed to a 70

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

Dataset: 1 2 3 3 4 4 4 4 5 5 6 7

As a general rule:

To prove the above statements, the mean and the standard deviations are calculated using online calculators

So, we have

Original dataset

1, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 7

Mean = 4

Standard deviation = 1.58

New dataset

1, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 70

Mean = 9.25

Standard deviation = 18.36

This means that changing 7 to 70 would increase the mean and the standard deviation

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A standard normal distribution's characteristics are its mean is equal to 0 and the standard deviation is 1. Thus, the variance is equal to 1.

A normal distribution that has a mean value of 0 and a standard deviation or a variance of 1 is said to be a standard normal distribution.

I.e., μ = 0 and σ² = 1

This is also called z-distribution.

A standard normal distribution has μ = 0 and σ² = 1.

So, the probability of a normal random variable is calculated by using a z-score.

The z-score value is calculated by the formula

z = (X - μ)/σ

Where mean (μ) and standard deviation (σ) for the variable X

By using the standard normal distribution tables with the z-score and probabilities, the required values are calculated.

So, we can conclude that the major characteristics of a standard normal distribution are mean = 0 and variance = 1.

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The conclusion is option A, we cannot reject the null hypothesis.

An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true.

The null hypothesis cannot  be rejected for the entire population if your sample is not sufficiently incompatible with it, which can be determined if your P value is small enough.

Therefore, we can not reject the hypothesis.

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The width of the bedroom is 17 feet. The length of the bedroom is 17 + 8 = 25 feet.

What is the area of the rectangle?

The area of the rectangle is length x breadth. The diagonals of the rectangle divide it into two equivalent right-angled triangles. Therefore, the area of the rectangle will be equal to the sum of the area of these two triangles.

Let w be the width of the bedroom and l be the length of the bedroom.

The width of the bedroom is 8 feet shorter than the length, so the length is w + 8.

The area of the bedroom is the product of its width and length, or w * (w + 8).

We can set up the equation 425 = w * (w + 8) and solve for w.

First, we can rewrite the equation as 425 = w^2 + 8w.

Then, we can complete the square by adding (8/2)^2 = 16 to both sides:

425 + 16 = w^2 + 8w + 16

441 = w^2 + 8w + 16

We can rewrite the left side of the equation as (w + 4)^2, which gives us:

(w + 4)^2 = 441

Taking the square root of both sides gives us:

w + 4 = 21

Subtracting 4 from both sides gives us:

w = 17

Therefore, the width of the bedroom is 17 feet. The length of the bedroom is 17 + 8 = 25 feet.

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1. Correlation is a bivariate analysis that measures the strength of association between two variables and the direction of the relationship. Regression is a statistical method to determine the strength and character of the relationship between one dependent variable and a series of other variables (known as independent variables). So, both correlation and regression require a measure for both variables individual variances.

2. We can test for the statistical significance of a correlation coefficients by performing a hypothesis test on the correlation coefficients. And it's also possible to perform hypothesis tests on the regression slope on the values which is being estimated using a regression analysis. So, both correlation and regression can be tested for statistical significance.

3. Correlation helps us to test the strength of association between two variables. But regression helps us to predict one of the variables from the other. So, it is true for a regression. It is only regression which provides a way to predict a specific value of one variable from the value of another variable.

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The width of the rectangle that maximizes the area is C/2 and the height of the rectangle that maximizes the area is C/2. The maximal area of the rectangle is C2/4.

The gap between a rectangle's length and width must be as small as possible for its area to be as large as possible. Therefore, the length in this scenario must be ceiling (perimeter / 4) and the width will be floor (perimeter /4). The greatest size of a rectangle with a given perimeter is therefore equal to ceiling(perimeter/4) * floor(perimeter/4)

The average of the maximum areas of land planted to a specific crop over the Relevant Period is referred to as the "maximum area for a particular crop."

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Answer:

x - 2 [tex]\frac{3}{4}[/tex] = 13 [tex]\frac{1}{4}[/tex]

x = 16

Step-by-step explanation:

x - 2 [tex]\frac{3}{4}[/tex] = 13 [tex]\frac{1}{4}[/tex]

x - [tex]\frac{11}{4}[/tex] = [tex]\frac{53}{4}[/tex]  Add [tex]\frac{11}{4}[/tex] to both sides

x = [tex]\frac{53}{4}[/tex] + [tex]\frac{11}{4}[/tex]

x = [tex]\frac{64}{4}[/tex]

x = 16

Answer:

[tex]x-2 \frac{3}{4}=13 \frac{1}{4}[/tex]

(where x is the original length of the pipe).

Original length of the pipe = 16 feet

Step-by-step explanation:

Let x be the original length of the pipe.

Given a plumber cuts 2 3/4 feet from a pipe and now has a pipe that is 13 1/4 feet long, the equation that models this is:

[tex]\boxed{ x-2 \frac{3}{4}=13 \frac{1}{4}}[/tex]

To determine the length of the original pipe, solve the equation for x.

Add 2 3/4 to both sides of the equation:

[tex]\implies x-2 \frac{3}{4}+2 \frac{3}{4}=13 \frac{1}{4}}+2 \frac{3}{4}[/tex]

[tex]\implies x=13 \frac{1}{4}}+2 \frac{3}{4}[/tex]

When adding mixed numbers, partition the mixed numbers into fractions and whole numbers, and add them separately:

[tex]\implies x=13 +\dfrac{1}{4}}+2 +\dfrac{3}{4}[/tex]

[tex]\implies x=13 +2 +\dfrac{1}{4}}+\dfrac{3}{4}[/tex]

[tex]\implies x=15 +\dfrac{1+3}{4}[/tex]

[tex]\implies x=15 +\dfrac{4}{4}[/tex]

[tex]\implies x=15 +1[/tex]

[tex]\implies x=16[/tex]

Therefore, the original length of the pipe was 16 feet.