In the children population served by a government agency (the "target" population), it
was found that altruism scores are normally distributed, with a mean of 66 and a
standard deviation of 11.5.
a. If a random sample of 27 children is drawn from the target population, what is
the probability that the sample obtained will have a mean altruism score of
lower than 72?
b. What is the probability of randomly drawing a sample of children from this
target population that will have a sample mean between 67 and 73 if the
sample size is 34?
c. What is the sample size (n) such that the probability of randomly drawing a
sample of children of the sample size (n) from this target population will have
a probability of 0.8 for a sample mean no greater than 67?

The meaning of point J(2,6) on the graph is given as follows:

The cost of 2 ounces of orange juice is $6.00.

The general format of an ordered pair is given by the rule presented as follows:

(x,y).

In which:

The input and output variables for this problem are given as follows:

Hence the point (2,6) represents that the cost of 2 ounces of orange juice is $6.00, meaning that the second option is the correct option in the context of this problem.

The coordinates of the point are (2,6).

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By answering the above question, we may state that We must thus locate function the value of h that makes the equation true in order to estimate the height of the tower platform.

Mathematicians study numbers, as well as their variations, equations, related forms, and conceivable arrangements of these. Function refers to the relationship between a set of inputs, each of which has an associated output. A function is an association of inputs and outputs, where each input leads to a single, identifiable output. Each function is given a domain, codomain, or scope. The letter f is frequently used to represent functions (x). A cross is typed. The four primary types of accessible functions are on functions, one-to-one capabilities, so numerous capabilities, in capabilities, and on functions.

The projectile's starting height above the earth must be determined. Setting the time to zero (t = 0) and finding h will allow us to do this.

The formula for the projectile's height at time t is:

[tex]vt + h + -16t2 = h(t)[/tex]

where h represents the projectile's initial height and v its initial velocity.

t = 0 results in:

[tex]h(0) = -16(0)^2 + v(0) + h h(0) = h[/tex]

Hence, h, the height of the tower platform, is the projectile's beginning height.

We must thus locate the value of h that makes the equation true in order to estimate the height of the tower platform.

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A. The equation given can be expressed in polar form using the Pythagoras theorem.
Let the polar coordinate of a point be (r, θ).
Let r = √(x^2 + y^2)
=> r^2 = x^2 + y^2
=> r^2 = 2x^2 - 6xy - 2x
Let θ = tan^-1 (y/x)
Now, the equation in polar form is:

r^2 = 2x^2 - 6xy - 2x

tan^-1 (y/x) = θ


To find the exact values, solve the equation for the given values of x and y:


For x = 0 and y = 2:

r^2 = 0 - 6*2 - 0

=> r^2 = -12

=> r = √12

=> r = 2√3

tan^-1 (2/0) = θ

=> θ = 90°

Hence, the point (x, y) = (0, 2) has polar coordinates (2√3, 90°).

B. The given cycle has a period of 12 hours. This means that the time between each high and low tide is 12 hours. The height of high tide is 6 feet and the height of low tide is 2 feet. This means that the amplitude of the cycle is 4 feet (6 feet - 2 feet).

Hence, the equation for the tide cycle can be expressed as:

Height = 4sin (π/6 * t) + 4

Where t is time in hours.

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Market Price: The point where supply and demand are equal.

Market price is the current price of a good or service that is determined by the interactions of buyers and sellers in a competitive market. It is the result of the forces of supply and demand and is determined by the number of buyers and sellers in the market and their respective levels of demand and supply. Market prices are affected by both external and internal market forces such as government policies, taxation, economic conditions, and availability of resources.

Demand: The quantity of a good or service that consumers are willing and able to buy

Supply: The quantity of a good or service that businesses are willing and able to provide

Producers: Individuals and organizations that determine what products and services will be available for sale

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Answer: D

Step-by-step explanation: Its D because for every 6 units is 3/2 pi

okjajsjajajamaakqkaka

It is false.

The equation for the volume of a prism is V=Bh, where B is the base area and h is the height. A rectangular base supports the prism. The rectangle has a 9 cm length and a 7 cm width. Area A of a rectangle is equal to its length (l) and width (w).

The area of a prism's base is typically represented by the variable B.

A prism's total surface area (which includes the bases) is typically denoted by T or A, while its lateral surface area (which includes the bases) is typically denoted by L.

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The order of the values from least to greatest is -2 1/4, -1 3/4, -1 1/4, 3/4, and 1 1/4.

The values can be compared using order of operations. First, we need to calculate the numerical values of each fraction. -2 1/4 is equal to -2.25, 1 1/4 is equal to 1.25, -1 3/4 is equal to -1.75, 3/4 is equal to 0.75, and -1 1/4 is equal to -1.25.

To order the values from least to greatest, we can use the following formula:

n1 < n2 < n3 < n4 < n5

Where n1 is -2.25, n2 is -1.75, n3 is -1.25, n4 is 0.75, and n5 is 1.25.

Therefore, the order from least to greatest is -2 1/4, -1 3/4, -1 1/4, 3/4, and 1 1/4.

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The number from the least to the greatest is -10, -8, 0, 7.

To order numbers means to arrange them in a particular sequence based on their magnitudes or values. This can be done in ascending order (smallest to largest) or descending order (largest to smallest).

Ascending order refers to arranging a set of numbers or values from the smallest to the largest value. For example, if we have a set of numbers {3, 1, 7, 2, 8}, arranging them in ascending order would give us {1, 2, 3, 7, 8}.

Descending order refers to arranging a set of numbers from the largest value to the smallest value. For example, if we have the numbers 7, 2, 9, 4, and 1, the descending order would be: 9, 7, 4, 2, 1.

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To find the probability that at least one apple is rotten, we can first find the probability that none of the apples are rotten and then subtract that from 1 to get the probability that at least one apple is rotten.

First, let's find the number of rotten apples in the box:
2/5 × 10 = 4
So there are 4 rotten apples and 6 good apples in the box.
Now, let's find the probability that none of the apples are rotten:
6/10 × 5/9 × 4/8 = 120/720 = 1/6
So the probability that none of the apples are rotten is 1/6.

Finally, we can find the probability that at least one apple is rotten by subtracting the probability that none of the apples are rotten from 1:
1 - 1/6 = 5/6
So the probability that at least one apple is rotten is 5/6.

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The rate of interest per annum will be 3.6%.

The interest earned on savings that are computed using both the original principal and the interest accrued over time is known as compound interest. A = P(1 + r/n)^nt, where P is the principal balance, r is the interest rate, n is the number of times interest is compounded annually, and t is the number of years, which is the formula for compound interest.

Given, Isabelle takes out a loan that gathers compound interest.

At the start, the loan amount is £5500

after the 1-year loan amount is £5698.00

After the 2-year loan amount is £5903.13

thus,

P = 5500

For t = 1 year A = 5698.00

since interest is annually thus, the value of n is 1

So, from the formula

5698 =  5500( 1 + r)

5500r = 5698 -5500

r = 198/5500

r = 0.036

or

rate of interest, r = 3.6%

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Answer:

Step-by-step explanation:

80*4=320km

So, the LU-factorization of the given matrix is:

LU = `[1 0 0 0]` `[4 0 1 8]`

`[0.25 1 0 0]` `[0 1 -4.25 6]`

`[0 4.25 1 0]` `[0 0 1.25 -2]`

`[0 0 -1.25 1]` `[0 0 0 1]`

The LU-factorization of a matrix is a method of decomposing a matrix into a lower triangular matrix (L) and an upper triangular matrix (U). The L matrix must have a unit diagonal, meaning that all the entries on the main diagonal are equal to 1.

To find the LU-factorization of the given matrix, we can use the following steps:

1. Begin with the given matrix:

`[4 0 1 8]`

`[1 1 -4 10]`

2. Use Gaussian elimination to transform the matrix into an upper triangular matrix (U):

`[4 0 1 8]` → `[1 1 -4 10]` → `[0 1 -4.25 6]` → U = `[0 0 1.25 -2]`

3. Now, we can use the entries from the Gaussian elimination to create the lower triangular matrix (L):

L = `[1 0 0 0]`

`[0.25 1 0 0]`

`[0 4.25 1 0]`

`[0 0 -1.25 1]`

4. Finally, we can write the LU-factorization as:

LU = `[1 0 0 0]` `[4 0 1 8]`

`[0.25 1 0 0]` `[0 1 -4.25 6]`

`[0 4.25 1 0]` `[0 0 1.25 -2]`

`[0 0 -1.25 1]` `[0 0 0 1]`

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There could be many other combinations of scores that would result in the same mean, median, and mode.

What is mean ?

Mean can be defined as ratio sum of given observations, total number of observations.

Since the median is 7 and the mode is 8, we can assume that the majority of her scores were in the range of 7-8 points. We can also assume that there were a few games in which she scored lower than 7 points and a few games in which she scored higher than 8 points.

Here's one possible set of scores that would result in a mean of 6, a median of 7, and a mode of 8:

Game 1: 3 points

Game 2: 5 points

Game 3: 6 points

Game 4: 7 points

Game 5: 7 points

Game 6: 8 points

Game 7: 8 points

Game 8: 8 points

Game 9: 9 points

Game 10: 10 points

Game 11: 11 points

Note that this is just one possible set of scores that would fit the given statistics.

Therefore, There could be many other combinations of scores that would result in the same mean, median, and mode.

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The heat associated with roasting 6.00 g of zinc sulfide is 27.1 kJ.

The molar mass of ZnS is 97.45 g/mol, which means that 6.00 g of ZnS is equal to:

6.00 g ZnS × (1 mol ZnS/97.45 g ZnS) = 0.0616 mol ZnS

According to the balanced equation, the roasting of 2 mol of ZnS releases 879 kJ of heat:

2 ZnS (s) + 3 O₂ (g) → 2 ZnO (s) + 2 SO₂ (g) ΔH = -879 kJ/mol

Therefore, the roasting of 0.0616 mol of ZnS releases:

(879 kJ/mol) × (0.0616 mol ZnS / 2 mol ZnS) = 27.1 kJ

Therefore, the heat associated with roasting 6.00 g of zinc sulfide is 27.1 kJ. Rounded to three significant digits, the answer is 27.1 kJ.

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A graphing calculator can be a useful tool for solving systems of linear equations because it is fast, accurate, and can handle more complex equations.

Graph is a mathematical representation of a network and it describes the relationship between lines and points.

A graphing calculator can be a useful tool for solving systems of linear equations because it can provide a quick and accurate visual representation of the solution.

Here are some reasons why someone might choose to use a graphing calculator instead of graphing by hand:

Speed:   Graphing by hand can be time-consuming, especially for more complex systems of equations.

Accuracy: When graphing by hand, it's easy to make mistakes in plotting points or drawing lines, which can lead to errors in the final solution

Multiple solutions: When dealing with systems of equations with multiple solutions, graphing by hand can be difficult and time-consuming.

Complex equations: Graphing by hand can become very challenging for systems of equations with more than two variables or for nonlinear equations.

Hence, a graphing calculator can be a useful tool for solving systems of linear equations because it is fast, accurate, and can handle more complex equations.

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Area of sector = (60°/360)*pi*(10 in)^2 = 25.13 in^2.

To solve for the Area of the shaded region in each circle, use the formula Area of circle = pi*r^2. For circle 5, Area of circle = pi*(16in)^2 = 201.06 in^2. For circle 6, Area of circle = pi*(22m)^2 = 1520.53 m^2.

To solve for the Arc Length of the following circles, use the formula Arc Length = (angle/360)*(2*pi*r). For circle 2, Arc Length = (150°/360)*(2*pi*3 m) = 11.78 m. For circle 1, Arc Length = (315°/360)*(2*pi*8 cm) = 21.99 cm.

To solve for the Area of the Sector in each circle, use the formula Area of sector = (angle/360)*pi*r^2. For circle 3, Area of sector = (150°/360)*pi*(19)^2 = 133.04. For circle 4, Area of sector = (60°/360)*pi*(10 in)^2 = 25.13 in^2.

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Answer:

No. It is a rational number.

Step-by-step explanation:

...

(a) True

(b) True

(c) False

(d) True

(e) False

(a) True. For any n × n invertible matrix A, the equation Ax = 0 admits only the trivial solution. This is because if A is invertible, then there exists an inverse matrix A^-1 such that A^-1A = I, where I is the identity matrix. Therefore, if Ax = 0, then A^-1Ax = A^-10, or x = 0. This means that the only solution to the equation is the trivial solution x = 0.

(b) True. For any two matrices A and B of size n × n, (AB)^T = (B^T) (A^T). This is a property of matrix multiplication and transposition, and can be easily verified by performing the operations on the matrices.

(c) False. Let A be a matrix of size n × n. If for two vectors y and z of R^n we have Ay = Az, it does not necessarily mean that y = z. It is possible for two different vectors to produce the same result when multiplied by the same matrix. For example, consider the matrix A = [[1, 0], [0, 1]] and the vectors y = [1, 0] and z = [0, 1]. Both Ay and Az will result in the same vector [1, 1], but y and z are clearly not equal.

(d) True. If A is a matrix of size n × n such that A^3 = I(n), then A is invertible. This is because A^3 = I(n) implies that A^2 = A^-1, meaning that the inverse of A exists and A is invertible.

(e) False. For any two matrices A and B of size n×n such that AB = 0, it is not necessarily true that A = 0 or B = 0. It is possible for two non-zero matrices to multiply to produce the zero matrix. For example, consider the matrices A = [[1, -1], [1, -1]] and B = [[1, 1], [1, 1]]. Both A and B are non-zero matrices, but AB = 0.

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1. The arithmetic mean of the sample is: d. 3.50

To calculate the arithmetic mean, you need to add up all of the numbers in the sample and divide it by the total number of numbers in the sample. Using the given data, the total number is 20 (3+6+8+2=20). The total of the numbers in the sample is 31 (2+3+4+5=14). Therefore, the arithmetic mean of the sample is 31/20 = 3.50.

2. The average age of the children (x) is: c. 7.81

To calculate the average age of the children, you need to find the sum of the products of age and frequency (xf) and divide it by the total frequency (42). The sum of the products of age and frequency is 2628 (42+84+80+72+50=2628). Therefore, the average age of the children is 2628/42 = 7.81.

3. Standard deviation: a. 0.79

To calculate the standard deviation, you need to find the sum of the squares of the frequency multiplied by the square of the deviation (x²f) and divide it by the total frequency (42). The sum of the squares of the frequency multiplied by the square of the deviation is 6790 (252+588+640+648+500=6790). Therefore, the standard deviation is 6790/42 = 0.79.

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Answer: undefined

Step-by-step explanation:

(0+5)/(0+0)

The angle LZW, given that angles Izw and Wzo are supplementary, would be an Obtuse angle.

If the angles Izw and Wzo are supplementary, then their sum is equal to 180 degrees.

Since Wzo is an acute angle (meaning it measures less than 90 degrees), we know that Izw must be an obtuse angle, so that their sum is 180 degrees. An obtuse angle is an angle that measures greater than 90 degrees and less than 180 degrees. It is "obtuse" because it is more than a right angle (90 degrees), which is considered "sharp" or "acute".

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The value of x in the sequence notation is 27/4

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

[tex]\sum\limits^4_{j=-2} {2x(-\frac{3}{2})^j = \frac{1389}{32}[/tex]

When the above expression is expanded, we have the following equation

2x[(-3/2)⁻² + (-3/2)⁻¹ + (-3/2)⁰ + (-3/2)¹ + (-3/2)² + (-3/2)³ + (-3/2)⁴] = 1389/32

Evaluate the exponents the expressions

So, we have

2x[4/9 - 2/3 + 1 - 3/2 + 9/4 - 27/8 + 81/16] = 1389/32

Evaluate the fractions

2x * 463/144 = 1389/32

Evaluate the products

x * 463/72 = 1389/32

Solve for x

x = 72/463 * 1389/32

Evaluate

x = 27/4

Hence, the value of x is 27/4

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The correct order from least to greatest is: 3.1818181818, 5.55, 5.571, 5.58

To order these numbers from least to greatest, we first need to convert all of them to decimals so that we can compare them easily.

To convert (111)/(20) to a decimal, we can divide 111 by 20 to get 5.55.

To convert 5(7)/(11) to a decimal, we can first multiply 5 by 7 to get 35, and then divide 35 by 11 to get 3.1818181818.

Now we have the following numbers in decimal form:

5.58, 5.55, 5.571, 3.1818181818

Next, we can compare these numbers to determine their order from least to greatest.

3.1818181818 is the smallest number, followed by 5.55, then 5.571, and finally 5.58.

So, the correct order from least to greatest is:

3.1818181818, 5.55, 5.571, 5.58

In the original form of the numbers, the correct order is:

5(7)/(11), (111)/(20), 5.571, 5.58

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Answer:

n = 15

Step-by-step explanation:

A

the area (A) of a rectangle is calculated as

A = length × width

here length = n - 3 and width = 2 , then

A = 2(n - 3)

given A = 24 , then

2(n - 3) = 24

B

solving the equation for n

2(n - 3) = 24 ← divide both sides by 2

n - 3 = 12 ( add 3 to both sides )

n = 15

The bus’s speed on the level road was 72 mph if the bus traveled on a level road for 6 hours at an average speed of 20 miles per hour.

The given data is as follows:

The bus traveled on road time = 6 hours

Average speed = 20 miles/hour

Time spent on the winding road = 3 hours

Entire trip distance =  534 miles

The equation will be written as:

(x+20) * (6) + (x)(2) = 534

Now, "x" is the average speed on the winding road.

solving for x value,

6x + 120 + 2x = 534

8x = 534 -120

x = 414/8

x = 52

Now,  we calculated the average speed for the winding road.

The average speed for the level road is calculated as:

u1 + v1 = 52 + 20 = 72

Therefore we can conclude that the bus’s speed on the level road was 72 mph.

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The percentage of the discount is b) 75%.

Discount is the state of having a bond's price lower than its face value. The difference between the purchase price and the item's par value is the discount.

Discounts are different types of price reductions or deductions from a product's cost. It is frequently employed in consumer transactions when consumers receive discounts on a range of goods. The % discount rate is provided.

Here the original price of picture = 120.00

Sale price after discount = 29.99 ≅ 30

Now using discount percent formula,

=> Discount percentage = (original price- sale price)/(original price)*100

=> Discount percentage = [tex]\frac{120-30}{120}\times 100=\frac{90}{120}\times100 = 75\%[/tex]

Hence the percentage of the discount is b)75%.

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Answer: −3x^2+x+2

Step-by-step explanation:

Solution of the expression is,

⇒ - 3x² + x + 2

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications.

For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

WE have to given that;

To divide 15x⁴ − 5x³ − 10x² by −5x².

Now, We can solve as;

⇒ (15x⁴ − 5x³ − 10x²) / −5x²

⇒ 5x² (3x² - x - 2) / - 5x²

⇒ - (3x² - x  - 2)

⇒ - 3x² + x + 2

Thus, After divide we get;

⇒ - 3x² + x + 2

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The extraneous solutions of the equation (1)/(x+2)+(3)/(x+7)=(5)/(x²+9x+14) are x = 0, x = -7, and x = -14

To solve this equation, we must first simplify each side of the equation and then use the rule of equality. We can do this by finding the least common denominator (LCD) of the equation. In this case, the LCD is (x+2)(x+7)(x²+9x+14).

To simplify each side, we must multiply each term by the LCD divided by its original denominator. This leaves us with:

(x+2)(x+7)(x^2+9x+14) / (x+2) + (x+2)(x+7)(x²+9x+14) / (x+7) = (x+2)(x+7)(x²+9x+14) / (x²+9x+14)

We can now apply the rule of equality to solve the equation:

x³+11x²+37x+98 = 0

To find the solution of the equation, we must now factor the left side of the equation. We can do this by first factoring out a common factor of x, which gives us:

x(x²+11x+98) = 0

We can now factor the remaining trinomial, which gives us:

x(x+7)(x+14) = 0

Therefore, the extraneous solutions of the equation are: x = 0, x = -7, and x = -14

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Answer:

6.7+1.2=7.9

Step-by-step explanation:

6+1=7

0.7+0.2=0.9

so 7+0.9=7.9

so u have to break the numbers as tens and units