PLS HELP AND SHOW WORK PLS
A librarian has 274 return books. 50 of the books are reserved at her desk, and the remaining books need to be shelved. Each shelf can hold 14 books. write and solve an equation to find the number of shelves needed.

A grasshopper starts jumping forward on the real axis, starting at 0 in the positive direction.

Her jump sizes are independent, each has exponential distribution with mean 2 units.

(a) We have to determine the probability that the number of forward jumps it takes her to jump over 9 for the first time (in forward direction), is exactly 4.

P(k = 0) = [tex]\frac{2^{0}e^{-2}}{0!}[/tex] = 0.1353

P(k = 1) = [tex]\frac{2^{1}e^{-2}}{1!}[/tex] = 0.2706

P(k = 2) = [tex]\frac{2^{2}e^{-2}}{2!}[/tex] = 0.2706

P(k = 3) = [tex]\frac{2^{3}e^{-2}}{3!}[/tex] = 0.1804

P(k = 4) = [tex]\frac{2^{4}e^{-2}}{4!}[/tex] = 0.0902

The Probability = P(k = 0) + P(k = 1) + P(k = 2) + P(k = 3) + P(k = 4)

The Probability = 0.1353 + 0.2706 + 0.2706 + 0.1804 + 0.0902

The Probability = 0.9471

(b) We have to determine the probability that the number of backward jumps N it takes her to jump over 9 for the first time (in backward direction), is exactly 4.

P(k = 0) = [tex]\frac{1^{0}e^{-1}}{0!}[/tex] = 0.3678

P(k = 1) = [tex]\frac{1^{1}e^{-1}}{1!}[/tex] = 0.3678

P(k = 2) = [tex]\frac{1^{2}e^{-1}}{2!}[/tex] = 0.1839

P(k = 3) = [tex]\frac{1^{3}e^{-1}}{3!}[/tex] = 0.0613

P(k = 4) = [tex]\frac{1^{4}e^{-1}}{4!}[/tex] = 0.015325

The Probability = P(k = 0) + P(k = 1) + P(k = 2) + P(k = 3) + P(k = 4)

The Probability = 0.3678 + 0.3678 + 0.1839 + 0.0613 + 0.015325

The Probability = 0.996125

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The correct solution is 24cm.

What is a property of similarity?

When two objects have the same shape but different sizes, they can be said to be comparable. This indicates that comparable shapes superimpose one another when amplified or demagnified. The term "Similarity" refers to this characteristic of like shapes.

Here, we have

Given: ∆ ABC ~ ∆ DEF

BC = 16cm

EF = 12cm

DE = 18cm

We have to find the correct solution.

By the property of similarity,

The corresponding sides are proportional.

So, AB/DE = BC/EF = AC/EF

AB/DE = BC/EF

x/18 = 16/12

x = 16×18/12

x = 24cm

Hence, the correct solution is 24cm.

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The first block's acceleration is inversely proportional to its mass and directly proportional to the mass difference between the two blocks.

Without being aware of the precise values of m1, m2, and g, it is impossible to calculate the acceleration of the first block.

Newton's second rule of motion, which states that the net force on an object is equal to its mass times its acceleration, can be used to calculate the acceleration of the first block in the illustration.

Let's call the first block's acceleration "a." The difference between the tension force in the rope connecting the two blocks and the force of gravity can be used to calculate the net force exerted on the first block.

The rope's tension force is generated by:

T = m2 × g

The first block is subject to the following gravitational force:

Fg = m1 × g

The difference between these two forces is the net force exerted on the first block:

Fnet = T - Fg = (m2 - m1) × g = m2 × g - m1 × g

In light of Newton's second law, we can say:

Fnet = a × m1

(m2 - m1) × g = m1 × a

When calculating acceleration, we obtain:

a = (m2 - m1) × g / m1

As a result, the first block's acceleration is inversely proportional to its mass and directly proportional to the mass difference between the two blocks.

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Complete question -

The area of the region outside the doghouse that skipper can reach is 3(pi)^2 yards.

This problem is based on the area of sectors. Now, we know that a sector is a pie-shaped part of a circle made of the arc along with its two radii.

The image which correctly explains the situation in the problem is attached.

From the figure, we can see that the spot can be located anywhere in the two sectors of 120  and  60 degrees each respectively. Now, these radii are respectively of 2 and 1 yards.

Area of one sector of 120 degrees = 120/360 π (2)^2 since radius is 2 yards.

So, area of two sectors is 2 x  120/360 π (2)^2 = 8π /3 square yards.

Similarly, Area of the two 60 degrees sectors is -

2 x  60/360 π (2)^2 = π /3 sq. yards.

Therefore , the total area that the skipper can reach outside the doghouse is given by the sum of all the four sectors i.e. π /3 + 8π /3 =

3π square yards.

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The area of the region outside the doghouse that the skipper can reach is [tex]3\pi ^2[/tex] yards.

This problem is based on the area of sectors. Now, we know that a sector is a pie-shaped part of a circle made of an arc along with its two radii.

The image which correctly explains the situation in the problem is attached.

From the figure, we can see that the spot can be located anywhere in the two sectors of 120  and  60 degrees each respectively. Now, these radii are respectively 2 and 1 yards.

Area of one sector of 120 degrees [tex]=\frac{(\pi*2^2*120) }{360}[/tex] since the radius is 2 yards.

So, the area of the two sectors is [tex]\frac{(2*120*2^2*\pi )}{360}=\frac{8\pi }{3}[/tex] square yards.

Similarly, the Area of the two 60 degrees sectors is -

[tex]\frac{(2*60*\pi *2^2)}{360} =\frac{\pi }{3}[/tex] sq. yards.

Therefore, the total area that the skipper can reach outside the doghouse is given by the sum of all the four sectors i.e. [tex]\frac{\pi }{3} +\frac{8\pi }{3} =3\pi[/tex]square yards.

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Given:-

[tex] \: [/tex]

now, put the value in eqⁿ

[tex] \: [/tex]

[tex] \: [/tex]

[tex] \: [/tex]

[tex] \: [/tex]

[tex] \: [/tex]

hope it helps!:)

On solving the exponential function y = 49 (0.81)⁹, the number of Bison left after 9 years is obtained as 7.35 million.

What is an exponential function?

The formula for an exponential function is f(x) = aˣ, where x is a variable and a is a constant that serves as the function's base and must be bigger than 0.

The number of Bison that roamed were a = 49 million

The survival rate dropped to b = 0.81.

The time period is t = 9 years

The exponential function is -

y = abˣ

Substitute the values into the equation -

y = 49 (0.81)⁹

y = 49 × 0.1500

y = 7.35

Therefore, the number of Bison left is 7.35 million.

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The answer is the median would not change.

The median of a set of numbers is the middle value when the numbers are arranged in order. It is not affected by outliers or extreme values as much as the mean is.

If the number 1772 was accidentally changed to 1972, this would increase the value of the number and it would become an outlier in the set. To calculate the median, we need to arrange the numbers in order. The new set would be:

1362 1439 1460 1614 1666 1867 1972

The median of this set is 1614, which is the middle value. As you can see, the change from 1772 to 1972 did not affect the median.

Therefore, the answer is the median would not change.

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The answer is the median would not change.

The median of a set of numbers is the middle value when the numbers are arranged in order. It is not affected by outliers or extreme values as much as the mean is.

If the number 1772 was accidentally changed to 1972, this would increase the value of the number and it would become an outlier in the set. To calculate the median, we need to arrange the numbers in order. The new set would be:

1362 1439 1460 1614 1666 1867 1972

The median of this set is 1614, which is the middle value. As you can see, the change from 1772 to 1972 did not affect the median.

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The values of x and y in the triangle are 2√30 and 2√21

The value of y

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

y : 6 = 14 : y

Express as fraction

y/6 = y/14

So, we have

y^2 = 14 * 6

Evaluate

y = 2√21

For the value of x

Here, we have

x^2 = y^2 + 6^2

So, we have

x^2 = (14 * 6) + 6^2

Evaluate

x^2 = 120

So, we have

x = 2√30

Hence, the values are 2√21 and 2√30

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Answer:

(5, -2)

Step-by-step explanation:

6x + 10y = 10   You add the two equations together

-6x - 24 y = 18

       -14y = 28   Divide both sides by -14

y = -2

Substitute -2 for y into either of the two equations above or the two original equations.  I am going to choice

3x + 5y = 5

3x  + 5(-2) = 5

3x -10 = 5  Add 10 to both sides

3x - 10 + 10 = 5 + 10

3x = 15  Divide both sides by 3

x = 5

Check:

3x + 5y = 5

3(5) + 5(-2) = 5

15 - 10 = 5

5 = 5  Checks

-2x - 8y = 6

-2(5) - 8(-2) = 6

-10 + 16 = 6

6 = 6 Checks

The probability that someone who tries to buy tickets both through the internet and by telephone will obtain at least one ticket is equal to 1 minus the probability that they won't obtain a ticket through either method.

The probability that they won't obtain a ticket through either method is equal to the product of the probabilities of not obtaining a ticket through each method, since the events are independent.

Therefore, the probability that someone who tries to buy tickets both through the internet and by the telephone will obtain at least one ticket is:

1 - 0.006 = 0.994 = 0.994 (rounded to four decimal places)

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List the frequency's percentage. To do this, multiply your answer by 100 after dividing the frequency by the total number of results.

What is the relative frequency?

The proportion of outcomes where a specific event occurs to all trials, not in a hypothetical sample space but in a real experiment, is known as the empirical probability, relative frequency, or experimental probability of an event.

The ratio of the total number of events occurring in a scenario to the number of times an event occurs is known as relative frequency.

Two facts must be known in order to calculate the relative frequency:

1) the total number of occasions/trials

2) frequency count for a subgroup or category

Relative frequency = f/n

f = the number of times the data occurred in an observation.

n = total frequency.

The relative frequency percentage is f/n × 100%.

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The length of the curve is [5, 3].

A curve is a continuous and smooth function that can be represented in a three-dimensional space. The length of a curve is a measure of the distance between two points on the curve.

The curve r(t) = (-4t, -sin(t), -cos(t)) is a parameterized curve, where t is the parameter that defines the position of a point on the curve.

Here we need to find the length of this curve, we need to calculate the distance between two points on the curve for different values of t.

In order to find the length of the curve, we use the formula for the length of a vector, which is

=> √(x² + y² + z²),

where x, y, and z are the components of the vector.

In this case, the vector is the difference between two points on the curve. The length of the curve is then found by integrating the length of the vector over the interval [5, 3].

Complete Question:

Find the length of the given curve: r(t)=(−4t,−1sint,−1cost)where−5≤t≤3.

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7 = a × 2 + b × 0 + c × 1, 7 = a × 0 + b × 4 + c × 1, 13 = a × 3 + b × 4 + c × 10 are the first vector is a linear combination of the other vectors.

In linear algebra, a linear combination is an expression formed by multiplying each element of a set of vectors by a scalar (a real or complex number) and then adding the results. The scalars are called coefficients and the vectors are called terms.

A linear combination can be written as a sum of the form:

a1 × v1 + a2 × v2 + ... + an × vn

where a1, a2, ..., an are the coefficients and v1, v2, ..., vn are the vectors. The result of the linear combination is also a vector, which can be thought of as a combination of the original vectors, weighted by the coefficients.

Linear combinations are used in many applications, including solving systems of linear equations, finding eigenvectors and eigenvalues, and representing a vector as a combination of basis vectors in a vector space.

(a) To determine whether the first vector is a linear combination of the other vectors, we can write a system of equations and solve for the coefficients. If the coefficients exist and are unique, then the first vector is a linear combination of the other vectors. If the coefficients do not exist or are not unique, then the first vector is not a linear combination of the other vectors.

-3 = a × 1 + b × 2 + c × -1

3 = a × -1 + b × 1 + c × 2

7 = a × 2 + b × 0 + c × 1

We can solve this system of equations using methods such as Gaussian elimination or matrix inversion to obtain the coefficients: a = -2, b = -1, c = 4

Therefore, the first vector is a linear combination of the other vectors.

(b) Following the same procedure, we can write a system of equations and solve for the coefficients:

-2 = a × 1 + b × 2 + c × -2

11 = a × -1 + b × 1 + c × 4

7 = a × 0 + b × 4 + c × 1

We can solve this system of equations to obtain the coefficients: a = 3, b = -2, c = 2

Therefore, the first vector is a linear combination of the other vectors.

(c) Using the same procedure, we can write a system of equations and solve for the coefficients:

2 = a × 1 + b × -1 + c × 1

7 = a × 2 + b × 2 + c × 6

13 = a × 3 + b × 4 + c × 10

We can solve this system of equations, but it will have no solution, meaning the coefficients do not exist.

Therefore, the first vector is not a linear combination of the other vectors.

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For all the given vectors the first vector is a linear combination of the other vectors.

In linear algebra, a linear combination is an expression formed by multiplying each element of a set of vectors by a scalar (a real or complex number) and then adding the results. The scalars are called coefficients and the vectors are called terms.

A linear combination can be written as a sum of the form:

a1 × v1 + a2 × v2 + ... + an × vn

where a1, a2, ..., an are the coefficients and v1, v2, ..., vn are the vectors. The result of the linear combination is also a vector, which can be thought of as a combination of the original vectors, weighted by the coefficients.

Linear combinations are used in many applications, including solving systems of linear equations, finding eigenvectors and eigenvalues, and representing a vector as a combination of basis vectors in a vector space.

(a) To determine whether the first vector is a linear combination of the other vectors, we can write a system of equations and solve for the coefficients. If the coefficients exist and are unique, then the first vector is a linear combination of the other vectors. If the coefficients do not exist or are not unique, then the first vector is not a linear combination of the other vectors.

-3 = a × 1 + b × 2 + c × -1

3 = a × -1 + b × 1 + c × 2

7 = a × 2 + b × 0 + c × 1

We can solve this system of equations using methods such as Gaussian elimination or matrix inversion to obtain the coefficients: a = -2, b = -1, c = 4

Therefore, the first vector is a linear combination of the other vectors.

(b) Following the same procedure, we can write a system of equations and solve for the coefficients:

-2 = a × 1 + b × 2 + c × -2

11 = a × -1 + b × 1 + c × 4

7 = a × 0 + b × 4 + c × 1

We can solve this system of equations to obtain the coefficients: a = 3, b = -2, c = 2

Therefore, the first vector is a linear combination of the other vectors.

(c) Using the same procedure, we can write a system of equations and solve for the coefficients:

2 = a × 1 + b × -1 + c × 1

7 = a × 2 + b × 2 + c × 6

13 = a × 3 + b × 4 + c × 10

We can solve this system of equations, but it will have no solution, meaning the coefficients do not exist.

Therefore, the first vector is not a linear combination of the other vectors.

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it is often useful to find the Factors of a polynomial in order to find its roots.

The opposite of multiplying, factoring is the process of expressing a polynomial as the product of two or more factors. To factor polynomials, we often combine the following identities or characteristics with various techniques. Ab + Ac = a(b + c) in the statistical distribution.

Because it is derived from the words poly-, which means "many," and -nominal, which in this context means "term," polynomial means "many terms." In mathematics, a polynomial is an expression with variables and coefficients that employs only the operations of addition, subtraction, multiplication, and non-negative integer exponents.

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ysinx=x ² sinx+c where c is the constant of integration is the value of the differential equation.

Any equation containing one or more terms and one or more derivatives of the dependent variable with respect to the independent variable is referred to as a differential equation (i.e., independent variable)

dy/dx +ycotx=2x+x ² cotx  is of the form  dy/dx+Py=Q where P=cotx and Q=2x+x ² cotx

The solution is y×I.F=∫Q×I.Fdx+c

⇒ysinx=2∫xsinxdx+∫x² cosxdx

Consider ∫x² cosxdx

Take u=x ² ⇒du=2xdx and dv=cosxdx⇒v=sinx

∫x² cosxdx = x² sinx−2∫xsinxdx

∴ysinx=x ² sinx+c where c is the constant of integration.

Thus, ysinx=x ² sinx+c where c is the constant of integration is the value of the differential equation.

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Answer:

A= 1, B= 2, C= 3 D= 2

Step-by-step explanation:

A. 0. 0063 is the correct answer.

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The decision rule for Fresh First Grocery Store is to sell the bread at $1.50 per loaf if they can, otherwise they will feed it to the geese.

Fresh First Grocery Store purchases bread for $1 per loaf and sells it for $1.50 per loaf. This means that for every loaf of bread they sell, they will make a profit of $0.50. The decision rule for the grocery store is to sell the bread if they can, as this will result in a profit.

However, if they are unable to sell the bread, they have decided to feed it to the geese at a local pond. This decision is likely based on the idea that it is better to give the unsold bread to the geese rather than throw it away, as it will be put to good use and not go to waste.

In conclusion, the decision rule for Fresh First Grocery Store is to sell the bread at $1.50 per loaf if they can, otherwise they will feed it to the geese. This decision takes into account both the desire to make a profit and the desire to avoid waste and put unsold bread to good use.

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The Average Value of f(x) = (sin x)4^(cos x) for the closed interval 0≤ x≤π/2   is (B) 6/(πln(4))   .

The average value of a function over a closed interval can be found by calculating its definite integral over the interval and dividing by the length of the interval.

The function is : f(x) = (sin x)4^(cos x)  ;

Substituting the values :

we get ;

Average Value is = (1/π/2) × [tex]\int\limits^\frac{\pi }{2} _0[/tex] (sin x)4^(cos x) dx  .

On Simplifying ,

we get ;

Average Value is = [(-2/π)/ln(4) ] (1 - 4)

⇒ 6/(πln(4))

Therefore ,  the average value of the function over the interval 0≤ x≤π/2 is 6/(πln(4)).

What is the average value of f(x) = (sin x)4^(cos x) for the closed interval 0≤ x≤π/2 ?

(A) 3/ln(4)

(B) 6/(πln(4))

(C) 4/ln(4)

D) 8/(πln(4))

(E) 3π/(2ln(4))

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[tex]w^8[/tex] is the expression using positive exponents.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

w³ x [tex]w^5[/tex]

= [tex]w^{3 + 5}[/tex]

= [tex]w^8[/tex]

Thus,

[tex]w^8[/tex] is the final expression.

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Answer:

1/6 of a mile

Step-by-step explanation:

if it is a constant pace, it must increase and decrease proportionately meaning, you divide the time by 2 so you divide the distance by 2 as well

The opposite side of a triangle is divided into two segments by the angle bisector theorem that are proportional to the other two sides of the triangle.

An angle bisector divides the opposite side of a triangle into two portions that are proportional to the other two sides, according to the angle bisector theorem.

According to the angle bisector theorem, the opposing side of a triangle is divided into two segments that are proportional to the other two sides of the triangle. A ray known as an angle bisector divides a given angle into two angles of the same size.

In order to solve proofs and find the appropriate portions of similar triangles, bisectors are crucial tools. A triangle's opposite side will be divided proportionally if one of the angle bisectors—there are three, one for each vertex—is drawn in.

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Analyzing a function's graph will reveal if it is linear or not. When a linear function is graphed, it produces a straight line. In contrast to a linear function, a nonlinear function has some kind of curve.

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If the probability distribution of x is known, this probability can be calculated as the probability mass or density at x = 1. If the probability distribution is unknown, then p(x = 1) cannot be determined.

1. The quantity p(x = 1) is equal to the probability of x occurring when x = 1.

This statement is true. It means that the probability of an event x occurring is equal to the probability of x having the value of 1.

2. If the probability distribution of x is known, this probability can be calculated as the probability mass or density at x = 1.

This statement is also true. If the probability distribution of x is known, then the probability of x having the value of 1 can be calculated using the probability mass or density at x = 1.

3. If the probability distribution is unknown, then p(x = 1) cannot be determined.

This statement is also true. If the probability distribution of x is unknown, then the probability of x having the value of 1 cannot be determined.

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Given: A boat is located 324 feet from the base of the cliff.

The distance from the top of the cliff to the boat is 81 more than twice the height of the cliff, or 2h + 81.

We want to find: The height of the cliff, h.

Equations:

h + (2h + 81) = 324 (The height of the cliff plus the distance from the top of the cliff to the boat is equal to 324 feet)

3h + 81 = 324 (Expanding the left side of equation 1)

3h = 243 (Subtracting 81 from both sides of equation 2)

h = 81 (Dividing both sides of equation 3 by 3)

Therefore, the height of the cliff, h, is 81 feet.

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The required coordinate of the point on the segment from (3,4) to (9,1)  is (7 , 7/3) which partitioned the segment into a ratio of 2 to 1.

The coordinates of the point on the directed line segment from (3,4) to (9,1)  that partitions the segment into a ratio of 2 to 1

Section formula.

x = mx₂ + nx₁ / m + n   ; y = my₂ + ny₁ / m + n

Where, m = 2 and n = 1
Substitute the value in the above equation,
x = 2 × 9 + 1 × 3 / 2 + 1 ; y = 3 × 1 + 1 × 4 / 2 +1
x = 21 / 3                     ; y = 7/3

x = 7                            ; y = 7/3

Thus, the required coordinate of the point on the segment from (3,4) to (9,1)  is (7 , 7/3) which partitioned the segment into a ratio of 2 to 1.

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The multiples of 5 are completely divisible by 5. The multiples of 5 are 5, 10, 15, 20, etc.

What is multiple?

Manifold is the fundamental definition of multiple. A multiple in mathematics refers to the outcome of multiplying two numbers together.

The first 5 multiples of 5 are 5, 10, 15, 20, and 25. These can be written as:

5 × 1 = 5

5 × 2 = 10

5 × 3 = 15

5 × 4 = 20

5 × 5 = 25

5 × 6 = 30

5 × 7 = 35

5 × 8 = 40

5 × 9 = 45

5 × 10 = 50

The number whose unit digit is either 0 or 5 is a multiple of 5.

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The powerline cable diagonal length is 61 feet.

In a right-angled triangle, the square of the hypotenuse side is equal to the sum of the squares of the other two sides, according to Pythagoras's Theorem. These triangle's three sides are known as the Perpendicular, Base, and Hypotenuse.

Given:

Hypotenuse = x

Base = 50 feet

Perpendicular = 35 feet

Using Pythagoras theorem

H² = P² + B²

H² = 35² + 50²

H² = 1225 + 2500

H² = 3725

H= 61 feet

Hence, the diagonal length is 61 feet.

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In statistics the sampling method is collecting data based on sample of people who represent a population, whereas the census method involves studying each and every member of the population.

What is statistics?

The gathering, characterization, analysis, and drawing of inferences from quantitative data are all tasks that fall under the purview of statistics, a subfield of applied mathematics. Probability theory, linear algebra, and differential and integral calculus play major roles in the mathematical theories underlying statistics.

The differences between census and sampling method is -

The investigator gathers data using the census method, which asks questions about every component of the population.

The investigator gathers data using the sampling method by selecting a sample of the objects that represent the entire population.

The Census Method of Collecting Data is appropriate when the area under inquiry is rather small. The sampling method is preferred when the investigation region is large.

The Census Method requires more time to gather data. The sampling method requires less time to gather data.

Generally speaking, the Census Method is more accurate than the Sampling Method. This accuracy can be attributed to the Census Method's inclusion of a study of every component of the population. The sampling approach has a lower level of accuracy because it examines a smaller sample of the population. However, since there are fewer elements in the sampling method, errors are simple to find and eliminate. Consequently, if that's the case, the sampling method gives more accuracy than census method.

Therefore, the differences for census and sampling method are pointed out.

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What is the difference between census method and sampling method in statistics?