Housing prices in a small town are normally distributed with a mean of
131,000 and a standard deviation of 8,000
. Use the empirical rule to complete the following statement.

Answer:

Step-by-step explanation:

Triangle BDA right angled at A ⇒ BDA = 90

ABD = BDA - BAD = 90 - 45 = 45

Answer:

Step-by-step explanation:

The stock plan loses $140.00

Multiply the stock plan amount of $2000.00 x 7% = $140.00

The force on the longer side of the aquarium is 515200 N.

Given,Aquarium's width = 2 ft, length = 4 ft, and height = 2 ft.To find:The force on the longer side of the aquarium.Solution:The longer side of the aquarium is 4 ft long.

The force on the longer side of the aquarium can be calculated using the formula:

F = ρghA

Where,F = force on the surface ρ = density of the fluid h = depth of the fluidA = area of the Surface We know that the density of water is ρ = 1000 kg/m³.

The area of the surface is A = l × h = 4 × 2 = 8 sq ft (as the aquarium is rectangular)

The depth of the fluid (water) on the longer side is h = 2 ft.

The force on the longer side can be calculated as follows:

F = ρghA= 1000 × 32.2 × 2 × 8= 515200 N

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The value of x is: x=12.

Here, we have,

given that,

The volume of the rectangular pyramid below is 468 units.

we know that,

Note that the area B of the rectangular base with length x and width 9 units is:

B = 9x

Then, the volume V = 468 cubic units of the pyramid is related to its base area B = 9x and height h=13 as follows:

V =  1/3 Bh

substituting the values we get,

so, we get,

x = 12

So, the value of x is 12.

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Answer:

k = 6 and k = -4

Step-by-step explanation:

To determine two integral values of k (integer values of k) for which the roots of the quadratic equation kx² - 5x - 1 = 0 will be rational, we can use the Rational Root Theorem.

The Rational Root Theorem states that if a rational number p/q is a root of a polynomial equation with integer coefficients, then p must be a factor of the constant term (in this case, -1) and q must be a factor of the leading coefficient (in this case, k).

Possible p-values:

Possible q-values:

Therefore, all the possible values of p/q are:

[tex]\sf \dfrac{p}{q}=\dfrac{\pm 1}{\pm 1}, \dfrac{\pm 1}{\pm k}=\pm 1, \pm \dfrac{1}{k}[/tex]

To find the integral values of k, we need to check the possible combinations of factors. Substitute each possible rational root into the function:

[tex]\begin{aligned} x=1 \implies k(1)^2-5(1)-1 &= 0 \\k-6 &= 0 \\k&=6\end{aligned}[/tex]

[tex]\begin{aligned} x=-1 \implies k(-1)^2-5(-1)-1 &= 0 \\k+4 &= 0 \\k&=-4\end{aligned}[/tex]

[tex]\begin{aligned} x=\dfrac{1}{k} \implies k\left(\dfrac{1}{k} \right)^2-5\left(\dfrac{1}{k} \right)-1 &= 0 \\\dfrac{1}{k}-\dfrac{5}{k}-1 &= 0 \\-\dfrac{4}{k}&=1\\k&=-4\end{aligned}[/tex]

[tex]\begin{aligned} x=-\dfrac{1}{k} \implies k\left(-\dfrac{1}{k} \right)^2-5\left(-\dfrac{1}{k} \right)-1 &= 0 \\\dfrac{1}{k}+\dfrac{5}{k}-1 &= 0 \\\dfrac{6}{k}&=1\\k&=6\end{aligned}[/tex]

Therefore, the two integral values of k for which the roots of the equation kx² - 5x - 1 = 0 will be rational are k = 6 and k = -4.

Note:

If k = 6, the roots are 1 and -1/6.

If k = -4, the roots are -1 and -1/4.

Thus, Gini Coefficient,G = (A / (A + B)) = (1/2) / [(1/2) + (1/2)] = 0.5.Gini Coefficient is 0.5.

Given: Lorenz curve for state A can be given as L(p)=p^7/4.The formula for Gini Coefficient is G=(A/(A+B)).Here, L(p) = p^7/4Therefore, we need to find A and B.

A = Area between the Lorenz curve and the line of equality.B = Area between the Lorenz curve and the X-axis.

The line of equality is the straight line joining the origin and the end point of the Lorenz curve.A + B is equal to the total area of the graph.

L(p) = p^7/4

=> L(p) = p^(4/4) * p^(3/4)

=> L(p) = p * p^(3/4)

=> L(p) = p * L(p)^(3/4)

Now, we will differentiate both sides of the above equation to get the PDF (Probability Density Function) of the Lorenz Curve.

L(p) = p * L(p)^(3/4)dL(p)/dp

= L(p)^(3/4) + (3/4)*p*L(p)^(-1/4)*dL(p)/dp

=> dL(p)/dp

= (4/7)*p^(3/4)L(1) = 1 (as the total population is 100%)

Therefore, A = Area between the Lorenz curve and the line of equality = 1/2 and B = 1/2.

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Answer:

A. 0.2727

Step-by-step explanation:

The Gini coefficient is used to express the extent of income or wealth inequality within a population. It is expressed as a value between 0 and 1, where 0 represents complete equality, indicating that everyone in the population has the exact same wealth, and 1 indicates that one individual or household possesses all the wealth, while everyone else has none. Therefore, a Gini coefficient closer to 0 suggests a more equitable distribution of income or wealth, while a coefficient closer to 1 indicates a higher level of inequality.

The line of perfect equality is a 45-degree line in a graph. It is a reference line that represents a scenario where every member of a population has an equal share of the total income or wealth.

The Gini coefficient is equal to twice the area between the line of perfect equality and the Lorenz curve.

The given Lorenz curve is L(p) = p^(7/4).

Therefore, the line of perfect equality is L(p) = p.

To find the area between the line and curve, we can use integration.

[tex]\boxed{\begin{array}{c}\underline{\sf Area\;between\;two\;curves}\\\\\displaystyle \int^b_a f(x)-g(x)\; \text{d}x\\\\\textsf{where}\;f(x)\;\textsf{is\;above}\;g(x)\;\textsf{between\;the\;interval}\;[a,b]\\\\\end{array}}[/tex]

The cumulative proportion of the population ranges from 0 (0% of the population) to 1 (100% of the population). Therefore, the interval to use for the integration is [0, 1], as it is based on the assumption that the Lorenz curve represents the cumulative proportion of income received by the population.

Set up the integral to find the area between the curves:

[tex]\textsf{Area}=\displaystyle \int^{1}_{0}p\; \text{d}p-\int^{1}_{0} p^{\frac{7}{4}}\; \text{d}p[/tex]

Solve the integral:

[tex]\begin{aligned}\textsf{Area}&=\displaystyle \int^{1}_{0}p\; \text{d}p-\int^{1}_{0} p^{\frac{7}{4}}\; \text{d}p\\\\ &=\left[\dfrac{1}{2}p^2\right]^1_0-\left[\dfrac{4}{11}p^{\frac{11}{4}}\right]^1_0\\\\&=\left(\dfrac{1}{2}(1)^2-\dfrac{1}{2}(0)^2\right)-\left(\dfrac{4}{11}(1)^{\frac{11}{4}}-\dfrac{4}{11}(0)^{\frac{11}{4}}\right)\\\\&=\dfrac{1}{2}-\dfrac{4}{11}\\\\&=\dfrac{11}{22}-\dfrac{8}{22}\\\\&=\dfrac{3}{22}\end{aligned}[/tex]

As the Gini coefficient is equal to twice the area between the line of perfect equality and the Lorenz curve, the Gini coefficient is:

[tex]\begin{aligned}\sf Gini\;coefficient&=2 \cdot \dfrac{3}{22}\\\\&=\dfrac{6}{22}\\\\&=\dfrac{3}{11}\\\\&=0.2727\; \sf (4\;d.p.)\end{aligned}[/tex]

Therefore, the Gini coefficient is 0.2727 (rounded to four decimal places).

The percentage of scores below 260 is 15.87%.

The time period of the loan in days is A = 187 days

Given data ,

To determine the time period of the loan in days, we need to calculate the number of days between September 26, 2010, and March 6, 2011.

September 26, 2010 - March 6, 2011

To calculate the number of days, we consider:

September 2010: 30 days

October 2010: 31 days

November 2010: 30 days

December 2010: 31 days

January 2011: 31 days

February 2011: 28 days (since it is not a leap year)

March 2011: 6 days

Adding these days together:

On simplifying the equation , we get

30 + 31 + 30 + 31 + 31 + 28 + 6 = 187 days

Hence , the time period of the loan, rounded up to the next day, is approximately 187 days.

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Algebraically, the amount of money the insurance company will pay, represented as P, is equal to the total value of the stolen items (2b + t) minus the deductible (d).

Let's denote the amount of money the insurance company will pay as P. In this scenario, if the value of the stolen items is greater than the deductible, the insurance company will cover the loss, and Ron will receive compensation for the stolen items.

The total value of the stolen items can be calculated by adding the value of the bicycles (2b) and the value of the tools (t). So, the total value of the stolen items is 2b + t.

If the total value of the stolen items is greater than the deductible (d), then the insurance company will pay the difference between the total value and the deductible. Mathematically, this can be represented as:

P = (2b + t) - d

Therefore, algebraically, the amount of money the insurance company will pay, represented as P, is equal to the total value of the stolen items (2b + t) minus the deductible (d).

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Answer:

P'(-2,3)

Step-by-step explanation:

We see that P(-2,1) is 1 point down y = 2, so reflection across the line y = 2 will be 1 point up y = 2, so the answer is (-2,3)

The decimal number represented by the grid is 0.04.(option-a)

In the grid, we have 10 rows and 10 columns, which represent 100 equal parts. From the grid, we can see that there are 4 shaded parts.

To determine the decimal number represented by the grid, we need to determine the value of each shaded part based on the total number of equal parts represented on the grid. There are a total of 100 equal parts on the grid, so each part has a value of:

1 / 100 = 0.01

Since there are 4 shaded parts, we simply multiply 0.01 by 4 to get the value of the shaded portion:

0.01 * 4 = 0.04

In summary, we can determine the decimal number represented by the grid by dividing the total number of equal parts represented on the grid by the number of shaded parts and then multiplying by the value of each equal part. Based on this process, the grid represents the decimal number 0.04.(option-a)

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Note: The complete question is-"Which decimal number is represented by the shaded grid?" Choose from the options below.

a.0.04

b.4

c.0.004

d.0.4

The two column proof is written as follows

Statement                                                           Reason

< 1  = 62 degrees                                      given

< 1 + < 2 = 180°                                          Linear pairs are supplementary.

< 4 + < 2 = 180°                                          Linear pairs are supplementary.

< 1 + < 2 = < 4 + < 2                                  Substitution property of equality

< 1  = < 4                                                   Subtraction property of equality

< 1  = < 4 = 62 degrees                           Vertical angle theorem

When two lines intersect, vertical angles are created, and in this instance, the angles opposite each another are equal.

Two angles are said to be congruent when they are equal to each

Solving the problem

< 1 + < 2 = 180°  are a linear pair = 180

< 4 + < 2 = 180° are a linear pair = 180°

equating both

< 1 + < 2 = < 4 + < 2

< 1  = < 4

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Answer:

In the equation y = 2 cos(5x + 3) - 6, we can ignore the coefficients 2 and -6 for the purposes of calculating the period because they do not change the period. They only change the amplitude (2) and vertical shift (-6) of the function.

The coefficient 5 in front of x inside the cosine function affects the period of the function. It is a horizontal compression/stretch of the graph of the function.

The period of the basic cosine function, y = cos(x), is 2π. When there is a coefficient (let's call it b) in front of x, such as y = cos(bx), the period becomes 2π/b.

So, in your case, b = 5, so the period T of the function y = 2 cos(5x + 3) - 6 is:

T = 2π / 5

This is the simplest form for the period of the given function.

Answer:

M = a + 24, where a is James' age and M is his mother's

Step-by-step explanation:

a = James' age

His sister is 4 years younger than him:

a - 4 represents his sister's age.

His mother is 28 years older than his sister:

(a - 4) + 28

or a + 24 represents his mother's age

Let M = his mother's age

M = a + 24

The probability that the mean of the sample will be between 94.7 inches and 95.3 inches is approximately 0.436.

Option B is the correct answer.

We have,

To find the probability that the mean of the sample will be between 94.7 inches and 95.3 inches, we can use the Central Limit Theorem.

According to the Central Limit Theorem, the distribution of sample means approaches a normal distribution as the sample size increases.

In this case, the mean of the population (μ) is 95 inches and the standard deviation of the population (σ) is 0.52 inches.

Since the sample size is sufficiently large (n = 30), we can assume that the distribution of sample means will be approximately normal.

To calculate the probability, we need to standardize the sample mean using the z-score formula:

z = (x - μ) / (σ / √n)

where:

x = sample mean

μ = population mean

σ = population standard deviation

n = sample size

Let's calculate the z-scores for the lower and upper limits:

z1 = (94.7 - 95) / (0.52 / √30)

z2 = (95.3 - 95) / (0.52 / √30)

Now, we can use a standard normal distribution table or a calculator to find the probability associated with these z-scores.

Using a standard normal distribution table or a calculator, we find:

P(z1 < Z < z2) ≈ 0.436

Therefore,

The probability that the mean of the sample will be between 94.7 inches and 95.3 inches is approximately 0.436.

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The value of x converges to approximately 2.5615

Given is an equation, we need to solve for x, xˣ = 4ˣ + 16

To solve the equation xˣ = 4ˣ + 16, we'll use algebraic methods. Unfortunately, this equation does not have an explicit algebraic solution that can be found using elementary functions.

However, we can use numerical methods or approximation techniques to find an approximate solution.

One common numerical method for solving equations is the Newton-Raphson method.

Let's apply it to this equation:

Start with an initial guess for x, let's say x = 1.

Iterate using the following formula:

x(n+1) = x(n) - f(x(n)) / f'(x(n))

where f(x) = x^x - 4^x - 16 and f'(x) is the derivative of f(x) with respect to x.

Repeat step 2 until the value of x converges to a solution.

Let's perform a few iterations:

1st iteration:

x(1) = 1 - (1^1 - 4^1 - 16) / (1 * 1^0 - 4 * 4^0)

= 1 - (-11) / (-3)

≈ 3.6667

2nd iteration:

x(2) = 3.6667 - (3.6667^3.6667 - 4^3.6667 - 16) / (3.6667 * 3.6667^2.6667 - 4 * 4^2.6667)

≈ 2.6141

3rd iteration:

x(3) = 2.6141 - (2.6141^2.6141 - 4^2.6141 - 16) / (2.6141 * 2.6141^1.6141 - 4 * 4^1.6141)

≈ 2.5615

By continuing these iterations, you can refine the solution to any desired level of accuracy.

In this case, the value of x converges to approximately 2.5615.

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Using an exponential growth function or equation, the population of Okrika in 2023 with a population of 5,000 in 2006 is projected to be 8,264.

An exponential growth function is a mathematical equation that shows a constant rate of growth in the value or number over a period.

Exponential growth functions or equations are depicted as y = a(1 + r)ⁿ, where y is the final value, a is the initial value, (1 + r) is the growth factor, r is the growth rate, and n is the time or number of years.

Population of Okrika in 2006 = 5,000

Annual growth rate = 3% = 0.03 (3/100)

Exponential growth factor = 1.03 (1 + 0.03)

The number of years between 2023 and 2006 = 17 years

Let the projected population in 2023 = y

Exponential growth equation or function: y = 5,000 (1.03)¹⁷

y = 8,264.

Thus, based on an exponential growth function, we can conclude that at 3% annual growth rate, the population of Okrika in 2023 will be 8,264.

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Assume a population growth rate of 3% per year for Okrika.

The expression for the total number of cups Alison buys, in terms of p and b, is 12p + 18b.

The total number of cups Alison buys can be expressed in terms of the number of packs (p) and boxes (b) purchased.

In each pack, there are 12 cups,

so the total number of cups from packs would be 12p.

Similarly, in each box, there are 18 cups,

so the total number of cups from boxes would be \: 18b.

To find the total number of cups, we sum the cups from packs and cups from boxes:

Total cups = 12p + 18b

Therefore, the expression for the total number of cups Alison buys, in terms of p and b, is 12p + 18b.

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Answer:

[tex]\frac{2}{3}[/tex]

Step-by-step explanation:

Recall that the sample space for the results obtained by rolling a fair dice is {1,2,3,4,5,6}. So, the total number of outcomes is 6.

Since the desired outcome is rolling an odd number or a number less than 3, so the set of desired outcomes is {1,2,3,5}. Hence, the number of desired outcomes is 4.

Therefore, the required probability is:

[tex]\frac{\text{number of desired outcomes}}{\text{number of all outcomes}}=\frac{4}{6}=\frac{2}{3}[/tex]

Answer:

probability of rolling an odd number or a number less than 3 is [tex]\frac{2}{3}[/tex] or a 2 in 3 chance

Step-by-step explanation:

a die has 6 sides that are numbered 1 to 6.

3 of those sides are even numbers and 3 of those sides are odd numbers.

the question also states LESS THAN 3, which means that it does not include 3 itself, out of the 6 possible numbers, only two of them are less than 3 (1 and 2) so 2 out of 6 sides are less than 3, but one is already included in the probability, then we use the formula

[tex]\frac{number of desired outcomes}{number of total possible outcomes}[/tex] or [tex]\frac{4}{6}[/tex] which can be simplified to [tex]\frac{2}{3}[/tex]

The area of the trapezium is 99.225 inches².

A trapezium is the a quadrilateral. Therefore, the area of the quadrilateral can be calculated as follows:

area of the trapezium = 1 / 2 (a + b)h

where

Therefore,

area of the trapezium = 1 / 2 (6.3 + 12.6)10.5

area of the trapezium =  1 / 2 (18.9)10.5

area of the trapezium = 198.45 / 2

area of the trapezium = 99.225 inches²

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Answer:

$136.25 is how much you're saving (the discount)

$408.75 is the sale price

Step-by-step explanation:

How much you're saving: [tex]\$545(0.25)=\$136.25[/tex]

How much you'll pay after the discount: [tex]\$545-\$136.25=\$408.75[/tex]

Answer:

3n = 9n - 110

Step-by-step explanation:

Let's suppose that Patrick and Hall play n number of songs to earn the same amount of money.

For Patrick, the amount of money he earns is given by:

Money earned by Patrick = 3n

For Hall, the amount of money he earns after paying the $110 fee is given by:

Money earned by Hall = 9n - 110

To find the number of songs they will have to play in order to earn the same amount of money, we need to set these two expressions equal to each other and solve for n:

3n = 9n - 110

Simplifying this equation, we get:

6n = 110

Dividing both sides by 6, we get:

n = 110/6

n = 18.33 (rounded to two decimal places)

Since n represents the number of songs, it cannot be a fractional value. Therefore, we can conclude that they will have to play 18 songs to earn the same amount of money.

Therefore, the equation that could be used to find n, the number of songs they will have to play in order to earn the same amount of money, is:

3n = 9n - 110

Hope this helps!

The set of integers that are multiples of 5 can be represented using set notation as:

{...,-10, -5, 0, 5, 10, 15, 20, 25, 30, ...}

In set notation, this can be written as:

{ x | x ∈ ℤ, x is a multiple of 5 }

where "x" represents an element in the set, "ℤ" represents the set of integers, and the condition "x is a multiple of 5" specifies the property that the element must satisfy.

Answer:

Step-by-step explanation:

sin (B) = [tex]\frac{2}{5}[/tex]

The function values are:

f(-1) = -9

f(1) = -5

We have,

From the graph,

We have the coordinates as:

(-1, -9) (2, 0), (-4, 0), and (1, -5)

Now,

The coordinates mean (x, y).

x is the x-axis and y is the function value.

f(x) = y

So,

We can have,

When x = -1, y = -9 or f(-1) = -9

And,

When x = 1, y = -5 or f(1) = -5

Thus,

The function values are:

f(-1) = -9

f(1) = -5

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Si Verónica, Ana y Luis están pintando una barda y se les paga un total de 300 unidades monetarias (por ejemplo, dólares, pesos, etc.), para determinar cuánto dinero debería recibir cada uno, necesitamos más información sobre cómo se distribuye el trabajo entre ellos.

Si los tres contribuyen de manera equitativa y realizan la misma cantidad de trabajo, podrían dividir el pago de manera igualitaria. En ese caso, cada uno recibiría 100 unidades monetarias (300 dividido entre 3).

Sin embargo, si uno de ellos realiza más trabajo o tiene una mayor responsabilidad en la tarea, podría ser justo que reciba una porción mayor del pago. En ese caso, la distribución de los 300 unidades monetarias dependerá de un acuerdo previo entre ellos sobre cómo se divide el pago en función de la cantidad o calidad del trabajo realizado.

Es importante tener en cuenta que la asignación exacta de dinero puede variar dependiendo de las circunstancias y el acuerdo al que lleguen Verónica, Ana y Luis.

The value of F when d=3 and F is inversely proportional to [tex] {d}^{2} [/tex]is 4

Given: F is proportional to  [tex] {d}^{2} [/tex]

and d = 12 , when F = 4

We can rewrite the equation with a proportionality constant k as :

[tex]f = k \div {d}^{2} [/tex]

Substituting values F = 4 and d = 12 we get

4 = k / (12×12)

4 = k / 144

k = 576

Thus the value of the proportionality constant k is 576

Substituting k = 576 and d = 3, we get

F = 576/ (3×3)

F = 576/9

F = 64

Therefore, The value of F when d=3 and F is inversely proportional to

[tex] {d}^{2} [/tex]is 4

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Answer:

1, 215

Step-by-step explanation:

To calculate the cost of the cover, we need to know the area of the pool. Assuming that the pool is rectangular and has the dimensions given by the four numbers provided (30, 18, 18, 6), we can calculate the area as follows:

Area = length * width

Area = 30 * 18

Area = 540 square feet

Therefore, the cover for this pool would cost:

Cost = Area * Price per square foot

Cost = 540 * $2.25

Cost = $1,215

So the cover would cost $1,215.

Answer:

[tex]g^{-1}(x)=3x+12[/tex]

Step-by-step explanation:

The explanation is attached below.

The correct answer is "A. control group."

In an experiment, the control group refers to the group of subjects that does not receive any treatment or intervention.

They are used as a comparison or baseline to evaluate the effects of the treatment being tested.

In this case, the control group consists of dogs aged 10 and older with high blood pressure who are not given any medication.

By comparing the blood pressure measurements of this control group to the group of dogs receiving the new blood pressure medication, the scientist can determine the effectiveness of the medication.

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