2.

The cents portion from 100 randomly selected checks is

recorded in the frequency table. Find the test statistic x².

O

Cents Portion 0-24 25-49 50-74

Number

33

16

23

96. 000

0. 400

158. 000

75-99

28

Answers

Answer 1

The degree of freedom is 3

What is a Frequency Table?

A frequency table is a statistical utility that displays the spread of data by including each observed datum alongside its recurrence, expressing how often that value occurs in the given set.

To put it another way, it orders information by binding similar values and recording their respective appearances. Frequency tables are very beneficial for determining designs, trends, and exceptions within collections of data, as well as streamlining hefty quantities of information to enhance further scrutiny, such as computing possibilities or executing hypothesis examinations.

They can be conveyed through a tabular format or illustrated with histograms, bar graphs, or pies.

The frequency table is given below:

Interval              Observed frequency           Expected frequency

0-24                             33                                        25

25-49                           16                                         25

50-74                            23                                        25

75-99                            28                                       25

The value of [tex]x^2[/tex] is 3.62

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Related Questions

andrea's record label released her new album. andrea wants to know when she has sales of at least $20,000 per week. she uses the related equation below to determine when sales will be at least this amount, where t represents time in weeks.

Answers

For a andrea's record label released her new album, the simplified inequality of absolute value inequality in terms of t is equals to the t ≥ 10. The graph which represents the inequlity is option(b).

Andrea's record label released her new album. Now, she wants to know the sales of at least $20,000 per week. The equation where sales will be at least 20,000 amount is written as 20,000≤ 1000(-2|t - 15| + 30). We have to solve this inequality. Now, the inequality is written as 20,000 ≤ 1000(-2|t - 15| + 30)

dividing by 1000 both sides, [tex] \frac{20,000 }{1000} ≤ (-2|t - 15| + 30) [/tex]

=> 20 ≤ (-2|t - 15| + 30)

Substracts 20 from both sides

=> 20- 30 ≤ -2|t - 15| + 30 - 30

=> -10 ≤ -2|t - 15|

dividing by (-2) by both sides in above equation,

=> 5 ≤ | t - 15 |

=> -(t - 15) ≤ 5 ≤ (t - 15)

=> - t + 15 ≤ 5 ≤ t - 15

=> - t + 15≤ 5 or 5 ≤ t - 15

=> -t ≤ - 10 or 15 ≤ t

=> t ≥ 10

Hence, required graph is present in option(b)

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Complete question:

Andrea's record label released her new album. Andrea wants to know when she has sales of at least $20,000 per week She uses the related equation below to determine when sales will be at least this amount where t represents time in weeks, 20,000≤ 1000(-2|t - 15| + 30). If you simplify the inequality above to a simple absolute value inequality in terms of t (by getting |t - 15| by itself on one side) which of the following graphs represents the solution set to that inequality?

Use the given transformation to evaluate the integral. Double integral x^2da, where is the region bounded by the ellipse 9x^2 4y^2=36; x=2u, y=3v

Answers

The value of the double integral of x² over the region bounded by the ellipse 9x² + 4y² = 36 using the given transformation is π/4.

First, let's define the given transformation. We are given that x=2u and y=3v, which means that we are transforming our original x-y plane into a u-v plane.

We know that the region is bounded by the ellipse 9x² + 4y² = 36. Substituting the given transformations into this equation, we get:

9(2u)² + 4(3v)² = 36 36u² + 36v² = 36 u² + v² = 1

Now, we can use the transformation formula to evaluate the double integral of x² over this region. The transformation formula tells us that:

∬R f(x,y) dA = ∬S f(u,v) |J| dA

where R is the region in the x-y plane, S is the region in the u-v plane, f(x,y) is the integrand in the x-y plane, f(u,v) is the integrand in the u-v plane, |J| is the Jacobian determinant of the transformation (which we will find shortly), and dA is the area element in the respective planes.

In our case, f(x,y) = x² and f(u,v) = (2u)² = 4u². The area element dA in the x-y plane is dx dy, while in the u-v plane it is |6| du dv (since |J| = |d(x,y)/d(u,v)| = |6|). Thus, our integral becomes:

∬R x² dA = ∬S (4u²) (|6|) du dv

Integrating this expression over the limits -1 to 1 for both u and v, we get:

∬S (4u²) (|6|) du dv = 48 ∫∫S u² du dv

where S is the unit circle in the u-v plane. To evaluate the double integral ∫∫S u² du dv, we can use polar coordinates, where u = r cos θ and v = r sin θ. Then, the integral becomes:

[tex]\int _{\theta =0} ^{2\pi} \int_{r=0} ^{ 1}[/tex] (r² cos² θ) r dr dθ

Evaluating this integral using standard techniques, we get:

[tex]\int _{\theta =0} ^{2\pi} \int_{r=0} ^{ 1}[/tex] (r³ cos² θ) dr dθ

[tex]\int _{\theta =0} ^{2\pi} \int_{r=0} ^{ 1}[/tex] (cos² θ)/4 dθ

Simplifying this expression, we get:

[tex]\int _{\theta =0} ^{2\pi}[/tex] (cos² θ)/4 dθ = ∫θ=0 to 2π (1 + cos 2θ)/8 dθ

Using the fact that ∫ cos 2θ dθ = 0 and ∫ dθ = 2π, we get:

[tex]\int _{\theta =0} ^{2\pi}[/tex] (cos² θ)/4 dθ = (1/8) [tex]\int _{\theta =0} ^{2\pi}[/tex]dθ + (1/8) [tex]\int _{\theta =0} ^{2\pi}[/tex] cos 2θ dθ

Simplifying further, we get:

[tex]\int _{\theta =0} ^{2\pi}[/tex](cos² θ)/4 dθ = π/4

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Jordan lives 4.8 miles from school.
What is the average speed of his school
bus if it takes 20 minutes to reach the
school from his house?

Answers

Answer:

0.24 mi/min

Step-by-step explanation:

v = x/t

x= 4.8

t = 20

 so 4.8 divided by 20 = 0.24

one eight-ounce glass of apple juice and one eight-ounce glass of orange juice contain a total of 181.5 milligrams of vitamin c. two eight-ounce glasses of apple juice and four eight-ounce glasses of orange juice contain a total of 538.6 milligrams of vitamin c. how much vitamin c is in an eight-ounce glass of each type of juice? apple juice mg orange juice mg

Answers

The answer is that an eight-ounce glass of apple juice contains 54.5 milligrams of vitamin C, and an eight-ounce glass of orange juice contains 67 milligrams of vitamin C.



Let's use algebra to solve this problem.

First, let's define two variables:

- Let's call the amount of vitamin C in one eight-ounce glass of apple juice "a".
- Let's call the amount of vitamin C in one eight-ounce glass of orange juice "o".

Using this notation, we can translate the information given in the problem into two equations:

- Equation 1: a + o = 181.5 (since one glass of apple juice and one glass of orange juice contain a total of 181.5 milligrams of vitamin C)
- Equation 2: 2a + 4o = 538.6 (since two glasses of apple juice and four glasses of orange juice contain a total of 538.6 milligrams of vitamin C)

Now we can solve this system of equations to find the values of "a" and "o".

One way to do this is to use the first equation to express one variable in terms of the other. For example, we could solve for "a" by subtracting "o" from both sides of Equation 1:

a = 181.5 - o

Then we could substitute this expression for "a" into Equation 2, and solve for "o":

2(181.5 - o) + 4o = 538.6

363 - 2o + 4o = 538.6

2o = 175.6

o = 87.8

Now that we know that one eight-ounce glass of orange juice contains 87.8 milligrams of vitamin C, we can use Equation 1 to find the amount of vitamin C in one glass of apple juice:

a + 87.8 = 181.5

a = 93.7

Therefore, an eight-ounce glass of apple juice contains 93.7 milligrams of vitamin C, and an eight-ounce glass of orange juice contains 87.8 milligrams of vitamin C.

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Given a polynomial and one of its factors, drag the remaining factors of the polynomial into the bin.

x3−x2−5x−3; x−3

Answers

The one of the given factor of the polynomial x³−x²−5x−3 is (x -3) and other factors is given by option b. ( x + 1 )².

The polynomial is equal to,

x³−x²−5x−3

One of the factor of the polynomial x³−x²−5x−3 is equal to

(x - 3 )

To get the remaining factors of the polynomial factorize it by given factor we have,

x³−x²−5x−3

= x³ - 3x² + 2x² -6x + x -3

= x² (x - 3 ) + 2x ( x - 3 ) + 1 ( x -3 )

= ( x -3 ) ( x² + 2x + 1 )

Factorize it further to get the simple factors of the polynomial.

= ( x -3 ) ( x² + x + x + 1)

= ( x -3 ) ( x ( x +1) + 1( x+ 1) )

= ( x -3 ) ( x + 1 )²

Therefore, the other factors of the polynomial is equal to option b. (x+ 1)².

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The above question is incomplete, the complete question is:

Given a polynomial and one of its factors, drag the remaining factors of the polynomial into the bin.

x³−x²−5x−3; x−3

a. (x-1)   b. ( x+1)²  c. ( 2x+ 1)  d. 3x - 1

Express the rational function as a sum or difference of two simpler rational expressions. 9x 1 x2

Answers

Express the rational function 2x⁴/(x² - 2x) as a sum or difference of two simpler rational expressions:

2x⁴/(x² - 2x) = 2x² + 4x + 8 + 16/(x - 2).

The given expression is,

2x⁴/(x² - 2x)

simplifying we get,

= 2x⁴/x(x - 2) [taking 'x' as common from both the term of denominator]

= 2x³/(x - 2) [Cancelling the same value from numerator and denominator]

Now if we divide '2x³' by (x-2) we get

Quotient = 2x² + 4x + 8

Remainder = 16

So from the division algorithm we know that,

Dividend = Divisor*Quotient + Remainder

Here Dividend = 2x³ and Divisor = x - 2

So, 2x³ = (x - 2)*(2x² + 4x + 8 ) + 16

Now, 2x⁴/(x² - 2x)

= 2x³/(x - 2)

= ((x - 2)*(2x² + 4x + 8 ) + 16)/(x - 2)

= ((x - 2)*(2x² + 4x + 8) )/(x - 2) + 16/(x - 2)

= 2x² + 4x + 8 + 16/(x - 2).

So the simpler rational functions are: (2x² + 4x + 8) and 16/(x - 2).

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The question is incomplete. Complete question will be -

"Express the rational function as a sum or difference of two simpler rational expressions: 2x⁴/(x² - 2x)"

$n$ is a four-digit positive integer. dividing $n$ by $9$, the remainder is $5$. dividing $n$ by $7$, the remainder is $3$. dividing $n$ by $5$, the remainder is $1$. what is the smallest possible value of $n$?

Answers

To find the smallest possible value of $n$, we need to find the smallest value that satisfies all three conditions.

From the first condition, we know that $n = 9a + 5$ for some positive integer $a$.
From the second condition, we know that $n = 7b + 3$ for some positive integer $b$.
From the third condition, we know that $n = 5c + 1$ for some positive integer $c$.
We can set these equations equal to each other and solve for $n$:
$9a + 5 = 7b + 3 = 5c + 1$
Starting with the first two expressions:
$9a + 5 = 7b + 3 \Rightarrow 9a + 2 = 7b$
The smallest values of $a$ and $b$ that satisfy this equation are $a=2$ and $b=3$, which gives us $n = 9(2) + 5 = 7(3) + 3 = 23$.
Now we need to check if this value of $n$ satisfies the third condition:
$n = 23 \not= 5c + 1$ for any positive integer $c$.
So we need to try the next possible value of $a$ and $b$:
$9a + 5 = 5c + 1 \Righteous 9a = 5c - 4$
$7b + 3 = 5c + 1 \Righteous 7b = 5c - 2$
If we add 9 times the second equation to 7 times the first equation, we get:
$63b + 27 + 49a + 35 = 63b + 45c - 36 + 35b - 14$
Simplifying:
$49a + 98b = 45c - 23$
$7a + 14b = 5c - 3$
$7(a + 2b) = 5(c - 1)$
So the smallest possible value of $c$ is 2, which gives us $a + 2b = 2$. The smallest values of $a$ and $b$ that satisfy this equation are $a=1$ and $b=1$, which gives us $n = 9(1) + 5 = 7(1) + 3 = 5(2) + 1 = 46$.
Therefore, the smallest possible value of $n$ is $\boxed{46}$.

To find the smallest possible value of $n$ which is a four-digit positive integer such that dividing $n$ by $9$, the remainder is $5$, dividing $n$ by $7$, the remainder is $3$, and dividing $n$ by $5$, the remainder is $1$, follow these steps:
Step 1: Write down the congruences based on the given information.
$n \equiv 5 \pmod{9}$
$n \equiv 3 \pmod{7}$
$n \equiv 1 \pmod{5}$
Step 2: Use the Chinese Remainder Theorem (CRT) to solve the system of congruences. The CRT states that for pairwise coprime moduli, there exists a unique solution modulo their product.
Step 3: Compute the product of the moduli.
$M = 9 \times 7 \times 5 = 315$
Step 4: Compute the partial products.
$M_1 = M/9 = 35$
$M_2 = M/7 = 45$
$M_3 = M/5 = 63$
Step 5: Find the modular inverses.
$M_1^{-1} \equiv 35^{-1} \pmod{9} \equiv 2 \pmod{9}$
$M_2^{-1} \equiv 45^{-1} \pmod{7} \equiv 4 \pmod{7}$
$M_3^{-1} \equiv 63^{-1} \pmod{5} \equiv 3 \pmod{5}$
Step 6: Compute the solution.
$n = (5 \times 35 \times 2) + (3 \times 45 \times 4) + (1 \times 63 \times 3) = 350 + 540 + 189 = 1079$
Step 7: Check that the solution is a four-digit positive integer. Since 1079 is a three-digit number, add the product of the moduli (315) to the solution to obtain the smallest four-digit positive integer that satisfies the conditions.
$n = 1079 + 315 = 1394$
The smallest possible value of $n$ is 1394.

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Find the volume of the solid whose base is the region bounded by the ellipse 4x^2+9y^2=36 if the cross sections taken perpendicular to the y-axis are isosceles right triangles with the hypotenuse lying in the base

Answers

The volume of the solid is [tex]\frac{32}{3}[/tex] cubic units.

To find the volume of the solid, we need to integrate the area of each cross section taken perpendicular to the y-axis over the range of y-values that the ellipse covers.

the height of each cross section will be equal to the y-coordinate of the ellipse at that point, since the triangles are isosceles and right-angled. The base of each cross section will be twice the height, since the triangles are isosceles, and the hypotenuse will lie in the ellipse.

So, for a given y-value, the area of the cross section will be:

[tex]A(y) = \frac{1}{2} \cdot 2y \cdot y = y^2[/tex]

To find the limits of integration for y, we need to find the y-coordinates of the points where the ellipse intersects the y-axis. We can do this by setting x = 0 in the equation of the ellipse:

[tex]4x^2 + 9y^2 = 36\\9y^2 = 36\\y^2 = 4\\y = \pm 2[/tex]

So, the limits of integration for y are -2 and 2.

The volume of the solid can now be found by integrating the area of the cross sections over the range of y-values:

[tex]V = \int_{-2}^{2} A(y) dy\\V = \int_{-2}^{2} y^2 dy\\\\V = \frac{1}{3}y^3 \Bigg|_{-2}^{2}\\V = \frac{1}{3}(2^3 - (-2)^3)\\V = \frac{32}{3}[/tex]

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Find the product. 4x3y(-2x2y) 2x 5y 2 -8x 5y 2 -8x 6y -8x 5y

Answers

The calculated value of the product of the expression 4x³y(-2x²y) is -8x⁵6y²

How to determine the value of the expression

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

4x³y(-2x²y)

We need to know that algebraic expressions are described as expressions that are composed of variables, their coefficients, terms, factors and constants.

These expressions are also made up of arithmetic or mathematical operations.

These mathematical operations are;

AdditionBracket and ParenthesesSubtractionMultiplicationDivision

From the information given, we have that

4x³y(-2x²y)

Expanding the bracket, we have;

4x³y(-2x²y) = -8x⁵6y²

Hence, the solution of the product expression is -8x⁵6y²

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If F (x, y) = (3 + 2xy) i + (x^2 − 3y^2) j,

Find a Function F = ∇f

2) Evaluate the line integral ∫ F. Dr, where C is the curve given by

C

r(t) = e^t sin t i + e^t cos t j, 0≤t≤π

Answers

The function F = ∇f is obtained by taking the partial derivatives is (3 + 2xy) i + (x² − 3y²) j where C is a constant. The line integral ∫ F. Dr is evaluated by plugging in the parametric equations of the given curve C into the function F is 38.36.

To find a function F = ∇f, we need to find the gradient of f, which is a vector-valued function that has F as its gradient. Therefore, we need to find the partial derivatives of f with respect to x and y.

∂f/∂x = 3 + 2xy

∂f/∂y = x² − 3y²

Integrating the first equation with respect to x, we get

f(x, y) = 3x + x²y + g(y)

where g(y) is an arbitrary function of y that depends only on y.

Taking the partial derivative of f with respect to y, we get:

∂f/∂y = x² + g'(y)

Comparing this to the second equation, we get

g'(y) = −3y²

Integrating g'(y) with respect to y, we get

g(y) = −y³ + C

where C is a constant of integration.

Substituting this into our expression for f(x, y), we get:

f(x, y) = 3x + x²y − y³ + C

Therefore, F = ∇f is given by

F = ∇f = (3 + 2xy) i + (x² − 3y²) j

To evaluate the line integral ∫ F·dr, we need to first parameterize the curve C using t as the parameter.

[tex]r(t) = e^t sin(t) i + e^t cos(t)[/tex] j, 0 ≤ t ≤ π

The velocity vector of the curve is given by

r'(t) = [tex]e^t[/tex] (cos(t) i − sin(t) j)

Using the formula for the line integral, we get

∫ F·dr = ∫ F(r(t)) · r'(t) dt

Substituting in the expressions for F and r'(t), we get

∫ [(3 + 2xy) i + (x² − 3y²) j] · [[tex]e^t[/tex] (cos(t) i − sin(t) j)] dt

=[tex]\int\limits [3e^t cos(t) + 2e^{2t} sin(t) cos(t)] dt - \int\limits [3e^{2t} sin^{2t} - e^{2t} cos^{2t}] dt[/tex]

Evaluating these integrals, we get:

= [tex][3e^t sin(t) + 2e^{2t} sin^2(t)] + [3/2 e^{2t} sin^2(t) - 1/2 e^{2t} cos^2(t)][/tex] |_0^π

= [tex]3e^{\pi} - 3 + 7/2 e^{2\pi} - 7/2[/tex]

Therefore, the value of the line integral ∫ F·dr is approximately 38.36.

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suppose the size of the sample of employees to be selected is greater than 100. would the probability of rejecting the null hypothesis be greater than, less than, or equal to the probability calculated in part (c) ? explain your reasoning.

Answers

If the size of the sample of employees to be selected is greater than 100, the probability of rejecting the null hypothesis would be greater than the probability calculated in part (c) because with a larger sample size, the population mean can be estimated with greater accuracy.

How does sample size affect the estimated population mean?

The determination of the population mean is improved by a larger sample size, in accordance with the Central limit theorem.

In general, it is true that it will be simpler to compute the population mean value if we have a higher sample size (n).

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Ursula has a cylinder and a cone that have the same height and radius. Which ratio compares the volume of the cone to the volume of the cylinder?.

Answers

Answer:

3:1

Step-by-step explanation:

Anne is 35 years old, bob is 24 years old, charlie has feature a, and daniel doesn’t have feature a. You’re allowed to ask people how old they are and whether they have feature a. You want to conclusively test the hypothesis "among these four people, those above age 30 definitely have feature a".

Answers

To conclusively test the hypothesis "among these four people, those above age 30 definitely have feature a", you need to gather age and feature A information for Anne, Bob, Charlie, and Daniel.

You have the ages of Anne (35) and Bob (24) and feature A status of Charlie (has feature A) and Daniel (doesn't have feature A). You need to ask Anne and Bob about their feature A status and Charlie and Daniel about their ages.


1. Ask Anne if she has feature A.
2. Ask Bob if he has feature A.
3. Ask Charlie his age.
4. Ask Daniel his age.

After obtaining the missing information, compare it with the hypothesis to check if it holds true. The hypothesis will be true if both people above 30 years of age have feature A, and the others do not.

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what is the length in units when the endpoints are (12,13) and (9,2)

Answers

Answer:

Step-by-step explanation:

The length of the line between the two points is 11 units.

Answer:  √130  or  11.4

Step-by-step explanation:

For length you will need to find the distance from 1 point to next.

Distance formula:

[tex]d=\sqrt{(y_{2} -y_{1} )^{2} +(x_{2} -x_{1} )^{2} }[/tex]

where for point 1 and 2 (x, y); first number is x and second is y

d=[tex]\sqrt{(2-13)^{2} +(9-12)^{2} }[/tex]             plug in

=[tex]\sqrt{(-11)^{2}+(-3)^{2} }[/tex]                        simplify

=[tex]\sqrt{121+9}[/tex]

=[tex]\sqrt{130}[/tex]                                            the root cannot be simplified anymore

or if want decimal answer put in calc

=11.4

if s is the part of the sphere that lies above the cone in the first octant, find the following: sqrt(x^2 y^2)

Answers

√(x² y²) = √[(r² + 2x² y²)/(1 + k²)], This gives us the value of √(x² y²) for the part of the sphere that lies above the cone in the first octant.

To find the value of √(x²y²), we need to know the equation of the surface that defines the part of the sphere and the cone in the first octant.

Let's assume that the sphere has radius r and its center is at the origin. Then, the equation of the sphere is:

x² + y² + z² = r²

Since the part of the sphere that lies above the cone is in the first octant, we can limit our analysis to the region where x, y, and z are all positive.

Now, let's consider the cone. We can assume that the cone has its vertex at the origin and its axis is along the z-axis. The equation of the cone can be written as:

z = k*√(x² + y²)

where k is a constant that depends on the angle of the cone.

To find the value of s√(x² y²), we need to find the point (x,y,z) that lies on the surface that defines the part of the sphere and the cone. Since the point lies on both surfaces, it must satisfy both equations:

x² + y² + z² = r²     (equation of sphere)

z = k*√(x² + y²)     (equation of cone)

We can eliminate z from these equations by substituting the equation of the cone into the equation of the sphere:

x² + y² + (k*√(x² + y²))² = r²

Simplifying this equation, we get:

x² + y² + k²*(x²+ y²) = r²

Factorizing this equation, we get:

(1 + k²)* (x² + y²) = r²

Therefore,

x² y² = (x² + y²)² - 2x² y²

We can then substitute this value into the previous equation to get:

x² + y² + k²*(x² + y²) = r²

(1 + k²)* (x² + y²) = r² + 2x² y²

Taking the square root of both sides, we get:

Therefore, √(x² y²) = √[(r² + 2x² y²)/(1 + k²)], This gives us the value of √(x² y²) for the part of the sphere that lies above the cone in the first octant.

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Laura was asked to estimate the volume of dirt in a large hill outside her school. She decides to model the hill using a truncated cone. She estimates that the hill has a base diameter of 80 feet, a top diameter of 40 feet, and a helght of 24 feet. What is the approximate volume of dirt in the hill?


A. 30,144 ft3

B. 70,336 ft3

C. 120,576 ft3

D. 281,344 ft3

Answers

The volume of the truncated cone is approximately 70,336 ft3.

option B.

What is the volume of the truncated cone?

The volume of the truncated cone is calculated by using the following formula as shown below;

V = ¹/₃πh (R² + r² + Rr)

where;

h is the height of the cone = 24 ftR is the bigger radius = 80ft/2 = 40 ftr is the smaller radius = 40 ft/2 = 20 ft

The volume of the truncated cone is calculated as follows;

V = ¹/₃π(24) (40² + 20² + 40 x 20)

V = 70,371.7 ft³

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The price of a tablet was increased from $180 to $207. By what percentage was the price of the tablet increased?

Answers

Answer: The increase percentage of tablet was 15%

Step-by-step explanation:

The price of the a tablet was increased from $180 to $207

Old Price = $180

New Price = $207

Increased price (Change in price) = New Price - Old price

                                                      =  207 - 180

                                                      =  $27

Increase percentage = Change in price/Old price x 100

                                             

Hence, The increase percentage of tablet was 15%

A ladder leans against a vertical wall at slope of 9/4. The tip of the ladder is 13.7 feet from the ground. What is the length of the ladder?

Answers

The length of the ladder is approximately 17.4 feet.

Let's call the length of the ladder "L". We can use the Pythagorean theorem to solve for L.

We know that the ladder is leaning against a vertical wall at a slope of 9/4, which means that for every 9 units the ladder goes up, it goes 4 units away from the wall. We can use this to set up a right triangle with the ladder as the hypotenuse:

To know the sides use pythagorean theorem. The vertical distance from the ground to the tip of the ladder is 13.7 feet, so the length of the side opposite the angle θ (the angle between the ladder and the ground) is 13.7. The length of the side adjacent to θ (the distance from the wall to the base of the ladder) is (9/4) times the length of the opposite side.

Using the Pythagorean theorem, we have:

L² = (9/4 * 13.7)² + (13.7)²

L² = 114.96 + 187.69

L² = 302.65

L = √(302.65)

L ≈ 17.4

Therefore, the length of the ladder is approximately 17.4 feet.

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from a group of 12 students, we want to select a random sample of 5 students to serve on a university committee. how many combinations of random samples of 5 students can be selected? group of answer choices 60 95,040 25 792

Answers

The number of  combinations of random samples  of 5 students can be selected is 56, here, the correct answer is 60.

To find the number of combinations of selecting a random sample of 5 students from a group of 12 students, you can use the formula for combinations which is:

C(n, k) = n! / (k!(n-k)!)

where C(n, k) represents the number of combinations, n is the total number of students (12 in this case), and k is the number of students to be selected (5 in this case). The exclamation mark (!) represents a factorial, which means the product of all positive integers up to that number.

Using the formula, we can calculate the number of combinations:

C(12, 5) = 12! / (5!(12-5)!)
= 12! / (5!7!)
= (12×11×10×9×8) / (5×4×3×2×1)
= 95,040 / 1,680
= 56.52 (rounded)

Since the number of combinations must be a whole number, the correct answer is 56, which is not among the given answer choices. However, the closest answer choice to 56 is 60.

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What is sin 60°?
What is sin 60°

Answers

Answer:

sin (60°) = √3/2 = 0.866

and sin (60) is equal to cos(30) = 0.866 =√3/2

A population of three-toed sloths in a tropical forest has a maximum per capita growth rate of 0.8 per year. The population size is limited by the carrying capacity of the forest, which is 500 individuals. Which of the following is the growth rate of the sloth population when the population is made up of 275 individuals?

Answers

The growth rate of the sloth population when the population is made up of 275 individuals is 99 individuals per year.

To calculate the growth rate of the three-toed sloth population when there are 275 individuals, we will use the logistic growth model formula:

Growth rate = r * N * (1 - N/K)

where r is the maximum per capita growth rate (0.8 per year), N is the current population size (275 individuals), and K is the carrying capacity of the forest (500 individuals).

Growth rate = 0.8 * 275 * (1 - 275/500)
Growth rate = 0.8 * 275 * (1 - 0.55)
Growth rate = 0.8 * 275 * 0.45
Growth rate ≈ 99 individuals per year

So, the growth rate of the sloth population when the population is made up of 275 individuals is approximately 99 individuals per year.

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2 pounds of apples cost $0. 76 How much would 5. 5 pounds cost

Answers

Answer: $2.09

Step-by-step explanation: 0.76/2=0.38 so each pound of apples costs $0.38. Since we want to find how much 5.5 pounds cost, we multiply by 5.5. $0.38*5.5=$2.09 so our answer is $2.09

Non self supporting ladders must be placed or positioned at an angle where the horizontal distance.

Answers

When using non-self supporting ladders, it is essential to ensure they are positioned at an appropriate angle to provide the necessary stability and safety for the user.

The angle at which the ladder is placed is critical because it determines the distance between the base of the ladder and the wall or surface it is resting against, In general, non-self supporting ladders must be positioned at an angle where the horizontal distance is no less than 1/4 of the ladder's working length.

For example, if you are using a 12-foot ladder, the base of the ladder should be positioned 3 feet away from the wall or surface it is leaning against. This ensures that the ladder is stable and will not slip or tip over during use.



The angle of the ladder is also important because it affects the amount of force and pressure exerted on the ladder and the surface it is resting against. If the ladder is placed at too steep of an angle, the weight of the user can cause the ladder to slide or fall backward. Conversely, if the ladder is placed at too shallow of an angle, the weight of the user can cause the ladder to slide or fall forward.



Therefore, it is crucial to position non-self supporting ladders at an appropriate angle to ensure the safety of the user. Always follow the manufacturer's guidelines and safety instructions when using ladders and avoid taking unnecessary risks. Remember to take your time and stay focused on the task at hand to avoid accidents and injuries.

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Every playing card belongs to one of four suits: spades (), hearts (♥), diamonds (♦), or clubs (♣). Two piles of cards are face down on a table so that you cannot see the suits. You pick one card at random from each pile.

Part A: Create an organized list of all the possible outcomes. Use S to represent a spade, H to represent a heart, D to represent a diamond, and C to represent a club.




Part B: How many possible outcomes are there?



Part C: Determine the probability that the two cards that you pick are a matching pair (two cards of the same suit). Explain your reasoning.




Part D: Determine the probability that at least one of the cards that you pick is a heart. Explain your reasoning.

Answers

The probability that at least one of the cards that you pick is a heart is 7/16.

How to solve

The possible outcomes are given below as:

(S,S), (S,H), (S,D), (S,C),

(H,S), (H,H), (H,D), (H,C),

(D,S), (D,H), (D,D), (D,C),

(C,S), (C,H), (C,D), (C,C)

In all, 16 possibilities exist.

The probability of getting a matching pair is 4/16 or 1/4.

Essentially, out of the 16 options laid out above, there will be four pairs the same: (S,S), (H,H), (D,D), and (C,C).

The chances that at least one heart is drawn can be calculated through this method:

Subtracting the chance that no hearts are drawn from 1 will tell us what we need to know

We find the odds of selecting no heart cards twice and multiply them: For both piles, it's 3/4 * 3/4 = 9/16.

Part D: Then we subtract that number from 1 to get the final answer: 7/16.

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A company makes steel solids that each have a mass of 1 kg.
One of their solids is a square-based pyramid joined to a cuboid as shown
below.
The base edges of the pyramid are of length 5cm, and the height of the
cuboid is 4 cm.
The density of the steel used by the company is 8 g/cm³.
The complete solid has a mass of 1 kg.
Calculate the vertical height of the pyramid.

Answers

The vertical height of pyramid is 3.6 cm.

Given that,

The base area of the pyramid is 5 cm², or 25 cm²

The formula V = (1/3) base area height can be used to determine the volume of a pyramid,

Where the solid's total height equals the sum of the cuboid and pyramid heights. T.

Let's abbreviate the pyramid's vertical height "h"

The height of the cuboid would thus be,

=  (1000g - 104.17gh)/(200g) or (1000g - (8g (25 h)/3))/(8 (5)²).

Therefore,

V = (1/3) 25cm2 h + 5cm (1000g - 104.17gh)/(8g/cm³ * (5cm)²)

It represents the solid's overall volume.

Given that we are aware that the solid has a mass of 1 kg (1000 g),

Adjust density times volume to equal mass:

8g/cm³ * V = 1000g

When we solve for V,

⇒V = 125cm3.

Solve for h by adding V to the previous equation and getting the following result:

h = (3(125cm³ 8g/cm³ - 5cm 1000g)/(25cm² 8g/cm³)

which can be expressed as h = 3.6 cm.

As a result, the pyramid has a 3.6 cm vertical height.

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17) Which organization encourages innovation by employees, encouraging them to pursue ideas?

Question 17 options:

matrix organization


functional organization


flatarchy organization


divisional organization

Answers

The flatarchy organization encourages innovation by employees, encouraging them to pursue ideas. So, correct option is C.

In a flatarchy, employees have a high degree of autonomy and decision-making power, which allows them to pursue and implement their ideas more easily.

This organizational structure allows for a more collaborative and open work environment where all employees, regardless of their position in the hierarchy, have the opportunity to contribute to the success of the organization.

In a flatarchy, employees are encouraged to share their ideas and collaborate with their peers. The organization empowers employees to take ownership of their work, encouraging them to be innovative and creative in their approach.

This approach is especially effective when the organization needs to be flexible and adaptable to a rapidly changing environment. By allowing employees to pursue their ideas and implement changes more quickly, the flatarchy organization can stay ahead of its competitors and continue to grow and evolve.

So, correct option is C.

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the five number summary of the distribution of scores on the final exam in Psych 001 last semester was 18, 39, 62, 76, 100. the 80th percentile was

Answers

The score at the 80th percentile is 67.6.

To find the 80th percentile, we need to determine the score that separates the top 20% of the scores from the rest.

The five-number summary gives us the minimum, maximum, median, and quartiles of the distribution. We can use this information to determine the interquartile range (IQR), which is the distance between the first and third quartiles:

IQR = Q3 - Q1 = 76 - 39 = 37

To find the score at the 80th percentile, we need to add 80% of the IQR to Q1:

score at 80th percentile = Q1 + 0.8 × IQR

= 39 + 0.8 × 37

= 67.6

Therefore, the score at the 80th percentile is 67.6.

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PLEASE HELP
Solve for x

Answers

Answer:

[tex] \frac{2}{7} = \frac{4}{x} [/tex]

[tex]x = 14[/tex]

Which set of ordered pairs is NOT a function?
a. {(9,0), (5, -8), (2, 0), (4, -2)}
b. {(-2, 3), (0, 3), (-2, 0), (10,-2)}
c. {(-3, 7), (0, -5), (2, 7), (1,9)}
d. {(-4, 9), (4, 8), (6, 9), (0, 0)}

Answers

Answer:

The correct answer is B. In set B, the input of -2 does not correspond to exactly one output.

the dotplot displayed shows the migraine intensity, on a scale of 1 to 10, for 29 adults suffering from recurring migraines. what is the five-number summary for this data set? list them in order.

Answers

the five-number summary for the given data set of migraine intensity, we need to find the minimum value, first quartile (Q1), median (Q2), third quartile (Q3), and maximum value in the data set. Here are the steps to find these values:


1. Arrange the data set in ascending order.
2. Find the minimum value, which is the first number in the sorted list.
3. Find the median (Q2): If the number of data points is odd, the median is the middle value. If the number of data points is even, the median is the average of the two middle values.
4. Find the first quartile (Q1): Q1 is the median of the lower half of the data set (excluding the median if there is an odd number of data points).
5. Find the third quartile (Q3): Q3 is the median of the upper half of the data set (excluding the median if there is an odd number of data points).
6. Find the maximum value, which is the last number in the sorted list.

Following these steps, you will have the five-number summary in order: minimum value, Q1, median (Q2), Q3, and maximum value.

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