A 400-room property that assigns 16 rooms to one section housekeeper and groups the section housekeepers in teams of 5 will need the following number of teams to service the guestrooms when the property is full:

Answer:

a) [tex] P(A|B) = \frac{15/83}{44/83} =\frac{15}{44}=0.341[/tex]

b) [tex] P(B|A) = \frac{29/83}{44/83} =\frac{29}{44}=0.659[/tex]

c)  A. A student given a $1 bill is more likely to have kept the money.

Because the probability 0.659 is atmoslt two times greater than 0.341

Step-by-step explanation:

Assuming the following table:

                                                     Purchased Gum      Kept the Money   Total

Students Given 4 Quarters              25                              14                      39

Students Given $1 Bill                       15                               29                    44

Total                                                   40                              43                     83

a. find the probability of randomly selecting a student who spent the money, given that the student was given a $1 bill.

For this case let's define the following events

B= "student was given $1 Bill"

A="The student spent the money"

For this case we want this conditional probability:

[tex] P(A|B) =\frac{P(A and B)}{P(B)}[/tex]

We have that [tex] P(A)= \frac{40}{83} , P(B)= \frac{44}{83}, P(A and B)= \frac{15}{83}[/tex]

And if we replace we got:

[tex] P(A|B) = \frac{15/83}{44/83} =\frac{15}{44}=0.341[/tex]

b. find the probability of randomly selecting a student who kept the money, given that the student was given a $1 bill.

For this case let's define the following events

B= "student was given $1 Bill"

A="The student kept the money"

For this case we want this conditional probability:

[tex] P(A|B) =\frac{P(A and B)}{P(B)}[/tex]

We have that [tex] P(A)= \frac{43}{83} , P(B)= \frac{44}{83}, P(A and B)= \frac{29}{83}[/tex]

And if we replace we got:

[tex] P(B|A) = \frac{29/83}{44/83} =\frac{29}{44}=0.659[/tex]

c. what do the preceding results suggest?

For this case the best solution is:

A. A student given a $1 bill is more likely to have kept the money.

Because the probability 0.659 is atmoslt two times greater than 0.341

Using the principles of conditional probability, we find that a student given a $1 bill is more likely to spend the money (probability approximately 0.641) than keep it (probability approximately 0.359). Therefore, option B is the correct interpretation of these results.

To answer this question, we should first understand that this problem is fundamentally about conditional probability, the probability of an event given that another event has occurred. Let's take this step by step.

Part a: Here, we want to find the probability of selecting a student who spent the money, given that the student was given a $1 bill. This number would be the number of $1 bill students who bought gum divided by the total number of $1 bill students. This equates to 25/(25+14) = 0.641. So, the probability is approximately 0.641.

Part b: In this situation, we're looking for the probability of selecting a student who kept the money, given that the student was given a $1 bill. This would be the number of $1 bill students who kept the money divided by the total number of $1 bill students, or 14/(25+14) = 0.359. The probability is approximately 0.359.

Part c: These results suggest that the appropriate solution is B: 'A student given a $1 bill is more likely to have spent the money than a student given four quarters.'

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Answer:

Lia needs [tex]7\frac{2}{4}\ cups[/tex] of flour and corn meal.

Step-by-step explanation:

Given:

Amount of flour needed = [tex]2\frac{3}{4} \ cups[/tex]

[tex]2\frac{3}{4} \ cups[/tex] can be Rewritten as [tex]\frac{11}{4}\ cups[/tex]

Amount of flour needed =  [tex]\frac{11}{4}\ cups[/tex]

Amount of Corn meal needed = [tex]4\frac{3}{4}\ cups[/tex]

[tex]4\frac{3}{4}\ cups[/tex] can be Rewritten as [tex]\frac{19}{4}\ cups[/tex]

Amount of Corn meal needed =  [tex]\frac{19}{4}\ cups[/tex]

We need to find the total amount of of flour and cornmeal she needs.

Solution:

Now we can say that;

the total amount of of flour and cornmeal she needs is equal to sum of Amount of flour needed and Amount of Corn meal needed.

framing in equation form we get;

the total amount of of flour and cornmeal she needs = [tex]\frac{11}{4}+\frac{19}{4}=\frac{11+19}{4}=\frac{30}{4}\ cups\ \ OR\ \ 7\frac{2}{4}\ cups[/tex]

Since Answers are not given:

Kindly chose the answer which contains below data.

Hence Lia needs [tex]7\frac{2}{4}\ cups[/tex] of flour and corn meal.

the maximum number of boxes that will fit on the shelf is 21.

To find out the maximum number of boxes that will fit on the shelf, we need to calculate the area of the shelf and the area of each box, then divide the total area of the shelf by the area of each box.

Given:

- Shelf dimensions: 65 cm x 35 cm

- Box dimensions: 180 mm x 60 mm

First, let's convert all dimensions to the same unit. Let's choose millimeters for consistency:

Shelf dimensions:

- Length: [tex]\(65 \, \text{cm} \times 10 \, \text{mm/cm} = 650 \, \text{mm}\)[/tex]

- Width: [tex]\(35 \, \text{cm} \times 10 \, \text{mm/cm} = 350 \, \text{mm}\)[/tex]

Now, let's calculate the area of the shelf:

[tex]\[ \text{Shelf area} = \text{Shelf length} \times \text{Shelf width} \][/tex]

[tex]\[ \text{Shelf area} = 650 \, \text{mm} \times 350 \, \text{mm} \][/tex]

[tex]\[ \text{Shelf area} = 227,500 \, \text{mm}^2 \][/tex]

Now, let's calculate the area of each box:

[tex]\[ \text{Box area} = \text{Box length} \times \text{Box width} \][/tex]

[tex]\[ \text{Box area} = 180 \, \text{mm} \times 60 \, \text{mm} \][/tex]

[tex]\[ \text{Box area} = 10,800 \, \text{mm}^2 \][/tex]

Now, to find out the maximum number of boxes that will fit on the shelf, we divide the shelf area by the area of each box:

[tex]\[ \text{Maximum number of boxes} = \frac{\text{Shelf area}}{\text{Box area}} \][/tex]

[tex]\[ \text{Maximum number of boxes} = \frac{227,500 \, \text{mm}^2}{10,800 \, \text{mm}^2} \][/tex]

[tex]\[ \text{Maximum number of boxes} \approx 21.06 \][/tex]

Since we can't have a fraction of a box, the maximum number of boxes that will fit on the shelf is 21.

complete question given below:

The campsite shop sells boxes of Funshine Cereal.

The base of each box is a 180 mm x 60 mm rectangle.

The shelf where the boxes are displayed is a 65 cm x 35 cm rectangle.

Work out the maximum number of boxes that will fit on the shelf.

the maximum number of boxes that will fit on the shelf is 21.

To find the maximum number of boxes that fit on the shelf, we divide the shelf area by the area of each box.

Given:

- Shelf dimensions: 65 cm x 35 cm

- Box dimensions: 180 mm x 60 mm

First, let's convert the shelf dimensions to millimeters for consistency:

Shelf dimensions:

- Length: [tex]\(65 \, \text{cm} \times 10 \, \text{mm/cm} = 650 \, \text{mm}\)[/tex]

- Width: [tex]\(35 \, \text{cm} \times 10 \, \text{mm/cm} = 350 \, \text{mm}\)[/tex]

Now, calculate the area of the shelf:

[tex]\[ \text{Shelf area} = \text{Shelf length} \times \text{Shelf width} \]\[ \text{Shelf area} = 650 \, \text{mm} \times 350 \, \text{mm} \]\[ \text{Shelf area} = 227,500 \, \text{mm}^2 \][/tex]

Next, calculate the area of each box:

[tex]\[ \text{Box area} = \text{Box length} \times \text{Box width} \]\[ \text{Box area} = 180 \, \text{mm} \times 60 \, \text{mm} \]\[ \text{Box area} = 10,800 \, \text{mm}^2 \][/tex]

Now, find the maximum number of boxes that fit on the shelf:

[tex]\[ \text{Maximum number of boxes} = \frac{\text{Shelf area}}{\text{Box area}} \]\[ \text{Maximum number of boxes} = \frac{227,500 \, \text{mm}^2}{10,800 \, \text{mm}^2} \]\[ \text{Maximum number of boxes} \approx 21.06 \][/tex]

Since we can't have a fraction of a box, the maximum number of boxes that will fit on the shelf is 21.

The probable question maybe:

The campsite shop sells boxes of Funshine Cereal.

The base of each box is a 180 mm x 60 mm rectangle.

The shelf where the boxes are displayed is a 65 cm x 35 cm rectangle.

Work out the maximum number of boxes that will fit on the shelf.

Answer:

C.

is the right answer

Step-by-step explanation:

The value of the 4 in 64.723 is 100 times the value of the 4 in 9.048. The correct option is B

A system of writing numbers is known as a number system. It is the mathematical notation for consistently using digits or other symbols to represent the numbers in a given set.

It represents the arithmetic and algebraic structure of the numbers and gives each number a distinct representation.

Given that there are two numbers 64.723 and 9.048. The value of the number 4 in one number is 100 times the other. As it is at one-hundredth place of another number

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Final answer:

Greg bought 12 books online. To find the number of books, set up the equation 6n + 3 = 75, subtract the shipping fee, and divide by the price per book.

Explanation:

Greg ordered books online for $6 each and paid a total of $75, which includes a $3 shipping fee. To determine the number of books Greg bought, you need to set up an equation that represents the total cost.

The cost of the books alone can be represented by 6 times the number of books (6n), and when you add the shipping cost of $3, it equals the total cost of $75. So the equation would be:

6n + 3 = 75

To solve for n, which is the number of books Greg purchased, follow these steps:

Subtract the shipping fee from the total cost: 75 - 3 = 72.

Divide the result by the cost per book: 72 ÷ 6 = 12.

Therefore, Greg bought 12 books.

Answer:

1215 minutes are the possible numbers he has used his phone in a month.

Step-by-step explanation:

He has a monthly fee of 14$ then to the least that he has been charged we need to substract the monthly fee as follows:

Monthly charged = 74,75-14

Monthly charged= 60,75$

Then he pays an additional 0,05 $/minute of use, to know the consume:

Minutes= [tex]\frac{60,75}{0,05}[/tex]

Minutes= 1215 possible numbers of minutes he has used his phone.

Step-by-step explanation:

Let the number be n.

When ​one-fourth of a number is added to ​one-fifth of the​ number, the sum is 18

          [tex]\frac{n}{4}+\frac{n}{5}=18\\\\\frac{5n+4n}{4\times 5}=18\\\\9n=4\times 5\times 18\\\\n=20\times 2\\\\n=40[/tex]

The number is 40.

Answer:

unknown number is 40

Step-by-step explanation:

 Let x be the unknown number

one-fourth of a number is added to ​one-fifth of the​ number

[tex]\frac{1}{4}x+\frac{1}{5} x[/tex]

sum is 18

[tex]\frac{1}{4}x+\frac{1}{5} x=18[/tex]

To solve for x take LCD 20

[tex]\frac{5}{20}x+\frac{4}{20} x=18\\ \frac{9}{20} x=18\\[/tex]

multiply both sides by 20

[tex]9x= 360[/tex]

divide both sides by 9

x=40

Answer:

Mrs. Jackson worked 32 hours.

Step-by-step explanation:

Given:

Mrs.Jackson earned a $500 bonus for signing a 1 year contract to work as a nurse.

Her salary is $22 per hour.

If her first weeks check including the bonus is $1204.

Now, to find the hours Mrs. Jackson work.

Amount of bonus = $500.

Total salary = $1204.

So, we deduct the amount of bonus from the total salary:

[tex]1204-500=\$704.[/tex]

The remaining salary = $704.

As, given her salary is $22 per hour.

Now, to get the hours she work we divide the remaining salary $704 by $22:

[tex]704\div 22[/tex]

[tex]=32\ hours.[/tex]

Therefore, Mrs. Jackson worked 32 hours.

Answer:

B. and C.

General Formulas and Concepts:

Calculus

Differentiation

Integration

U-Substitution

Step-by-step explanation:

*Note:

It seems like B and C are both the same answer.

Let's define our answer choices:

a.  [tex]\displaystyle \int {\sqrt{x - 1}} \, dx[/tex]

b.  [tex]\displaystyle \int {\frac{1}{\sqrt{1 - x^2}}} \, dx[/tex]

c.  [tex]\displaystyle \int {\frac{1}{\sqrt{1 - x^2}}} \, dx[/tex]

d.  [tex]\displaystyle \int {x\sqrt{x^2 - 1}} \, dx[/tex]

Let's run u-substitution through each of the answer choices:

a.  [tex]\displaystyle u = x - 1 \rightarrow du = dx \ \checkmark[/tex]

∴ answer choice A can be evaluated with a simple substitution.

b.  [tex]\displaystyle u = 1 - x^2 \rightarrow du = -2x \ dx[/tex]

We can see that this integral cannot be evaluated with a simple substitution. In fact, this is a setup for an arctrig integral.

∴ answer choice B cannot be evaluated using a simple substitution.

C.  [tex]\displaystyle u = 1 - x^2 \rightarrow du = -2x \ dx[/tex]

We can see that this integral cannot be evaluated with a simple substitution. In fact, this is a setup for an arctrig integral.

∴ answer choice C cannot be evaluated using a simple substitution.

D.  [tex]\displaystyle u = x^2 - 1 \rightarrow du = 2x \ dx \ \checkmark[/tex]

Using a little rewriting and integration properties, this integral can be evaluated using a simple substitution.

∴ answer choice D can be evaluated using a simple substitution.

Out of all the choices, we see that B and C cannot be evaluated using a simple substitution.

∴ our answer choices should be B and C.

Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Integration

Book: College Calculus 10e

====================================================

m = 1/7 is the slope

(x,y) = (0,0) is the origin the line goes through

y = mx+b

0 = (1/7)*0 + b

0 = 0+b

b = 0 is the y intercept

y = mx+b

y = (1/7)x+0

y = (1/7)x is the equation of the line

----------------------

To plot the equation of this line, mark the point (0,0) first.

Then move up 1 unit and to the right 7 units to arrive at (7,1) as the second point.

Draw a straight line through (0,0) and (7,1) as shown in the diagram below.

Point P is (0,0) and point Q is (7,1)

Points A through E in the same diagram represent the answer choices A through E.

Of the answer choices, only point D is on this line, so point D is the answer.

---------------

A non-visual way to find the answer is to plug each (x,y) coordinate from each answer choice into the equation we found above.

So for choice A we plug in x = 0 and y = 7

y = (1/7)*x

7 = (1/7)*0

7 = 0

we end up with a false equation, so choice A is ruled out. Similar stories happen with B, C, and E as well.

With choice D however, we plug in x = 14 and y = 2, and we get...

y = (1/7)*x

2 = (1/7)*14

2 = 14/7

2 = 2

Since we get a true equation, this confirms that (14,2) is on the graph of y = (1/7)x.

Defining the wrong choice:

Therefore, "Choice D" is the correct choice.

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Answer:

500 feet by 250 feet.

Step-by-step explanation:

Let the length be x and the width y feet.

As we have 1000 feet of wire:

x + 2y = 1000

2y = 1000 - x

y = 500 - 0.5x

So the area =   x(500 - 0.5x)

A =  500x - 0.5x^2

For a maximum  area the derivative

A' =  500 -x = 0

x = 500 feet.

2y = 1000 - 500

y = 250 feet.

Answer:

1 2/3

Step-by-step explanation:

Luis mixed all the trails thus:

4 2/3 + 1 1/4 + 1 1/3 + 3/4

= 15/3 + 5/4 + 4/3 + 3/4

= 60+15+16+9/12

Total trail mixed by Luis equals 100/12

He then divided 100/12 among his 5 friends thus:

100/12 ÷ 5

= 20/12

= 1 2/3 per friend.

Answer:

1  3/5

Step-by-step explanation:

the answer is 1.6 but you have to convert is to a fraction  because there are no  decimal numbers theres. if you convert it , it will be 1 3/5

Answer:

The number of bagels is 11 and the cups of coffee is 12.

Step-by-step explanation:

Given:

Keisha bought cups of coffee and bagels for the people in her office. Each bagel cost $2 and each cup of coffee cost $1.50.

Keisha spent a total of $40 to buy 23 items.

Now, to find the number of cups of bagels and coffee.

As given in question:

Let [tex]x[/tex] represent the number of bagels.

And [tex]y[/tex] represent the number of cups of coffee.

So, the total number of items:

[tex]x+y=23[/tex]

[tex]x=23-y[/tex]    ......(1)

Now, the total money spent on items:

[tex]2x+1.50y=40[/tex]

Substituting the value of [tex]x[/tex] from equation (1):

[tex]2(23-y)+1.50y=40[/tex]

[tex]46-2y+1.50y=40[/tex]

[tex]46-0.50y=40[/tex]

Subtracting both sides by 46 we get:

[tex]-0.50y=-6[/tex]

Dividing both sides by -0.50 we get:

[tex]y=12.[/tex]

The number of cups of coffee = 12.

Now, to get the number of bagel we substitute the value of [tex]y[/tex] in equation (1):

[tex]x=23-y[/tex]

[tex]x=23-12[/tex]

[tex]x=11.[/tex]

The number of bagels = 11.

Therefore, the number of bagels is 11 and the cups of coffee is 12.

Answer:

Available information is not sufficient to solve the questions

Step-by-step explanation:

Let Cm = Computers Ordered by Company M

Let Cn = Computers Ordered by Company N

Let Pm = Printers Ordered by Company M

Let Pn = Printers Ordered by Company N

Cm + Pm = 50 --- Equation 1

Cn + Pn = 60 ----- Equation 2

1. Company M and N ordered the same number of computers

Here,

Cm = Cn

Substitute Cm for Cn in equation 2

Cm + Pm = 50

Cm + Pn = 60

Subtract Equation 2 from 1

Pm - Pn = 50 - 60

Pm - Pn = -10

Pm = Pn - 10

Substitute Pn-10 for Pm in equation 1

Cm + Pn - 10 = 50

Make Pn the subject of formula

Cm = 50+10-Pn

Cm = 60 - Pn

Hence, the number of computers ordered by Company M is 60 minus the number of printers ordered by Company n

2. Company N ordered 10 more printers than Company M.

Here,

Pn = 10 + Pm

Make Pm the subject of formula

Pm = Pn - 10

Substitute Pn-10 for Pm in equation 1

Cm + Pn - 10 = 50

Make Cm the Subject of formula

Cm = 50 + 10 - Pn

Cm = 60 - Pn

Hence, the number of computers ordered by Company M is 60 minus the number of printers ordered by Company n

Condition 1 and 2 points to the same result

Answer:

(5/3, 41/3)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Algebra I

Step-by-step explanation:

Step 1: Define Systems

y = 10x - 3

y = 7x + 2

Step 2: Solve for x

Substitution

Step 3: Solve for y

Step 4: Check

Verify the solution set to the systems of equations by graphing the systems.

Where the 2 lines intersect is the solution set to the systems of equations.

We see graphically that point (1.666667, 13.66667), equivalent to (5/3, 41/3).

∴ (5/3, 41/3) or x = 5/3 and y = 41/3 is the solution to the systems of equations.

Final answer:

The solution to the system of equations y = 10x - 3 and y = 7x + 2 is x = 5/3 and y = 19/3.

Explanation:

The solution of the system of equations given by y = 10x - 3 and y = 7x + 2 can be found by setting the two expressions for y equal to each other since they both equal y. This yields the equation 10x - 3 = 7x + 2. Solving for x, we first subtract 7x from both sides to get 3x - 3 = 2. Then we add 3 to both sides to get 3x = 5. Finally, dividing both sides by 3 gives us x = 5/3. Substituting x back into either original equation, we get y = 10(5/3) - 3 or y = 7(5/3) + 2, both of which simplify to y = 19/3. Therefore, the solution to the system is x = 5/3 and y = 19/3.

Step-by-step explanation:

For a : Speed = distance / time

Distance covered = y2 - y1 = 20 - 15 = 5

Time taken = x2 - x1 = 8 - 0 = 8

Speed in part a : 5/8 = 0.625

4. It takes her 32 minutes to get home. We can see from the graph that it is the total time taken throughout the whole journey.

Answer:

The 3th answer is correct.

for x<2, form graph we know that if x=0 than y=-3.

For x<2 in 3th we have y=1/2x-3, so for x=0, y=(1/2)*0-3=0-3=-3. It fits.

For x=2, from graph we have that y=-2.

For x>=2 in 3th we have y=3x-8, so for x=2, y=3*2-8=-2. It fits.

These answer fit also i for first, but breakpoint for y from graph is point 2 not point -2, so the answer is 3th.

Answer:

Step-by-step explanation:

The sum of the interior angles = 180 (n-2)

where n is the number of sides of the polygon.

1) if the sum of the interior angles of a polygon equals 1980,

180(n - 2) = 1980

180n - 360 = 1980

180n = 1980 + 360 = 2340

n = 2340/180 = 13

2) if n = 9, the number of degrees would be

180(n - 2) = 180(9 - 2)

= 180 × 7 = 1260 degrees

3) 180(n - 2) = 1620

n - 2 = 1620/180 = 9

n = 9 + 2 = 11

4) n = 18

The number of degrees would be

180(n - 2) = 180(18 - 2) = 2880 degrees.

5) n = 17

The number of degrees would be

180(n - 2) = 180(17 - 2) = 2700 degrees.

6) the sum of the interior angles of a quadrilateral is 360 degrees.

In a universe of numbers 1 to 10, sets A, B, and C hold specific values. We explore intersections, differences, and unions. A's complement intersects C to give {2, 6, 8}, while B minus C's complement reveals {2, 4}. Their union boasts {1, 2, 3, 4, 5, 7, 10}, while B's complement meets A minus C in {7, 10}. Finally, (A minus B) and (B minus C) share no elements, resulting in an empty set.

Set Operations in U

Here's the breakdown of each set operation and the resulting sets:

(a) \overline{A} ∩ C:

\overline{A}: The complement of A, which includes all elements in U that are not in A. In this case, U \ A = {2, 3, 5, 6, 8, 9}.

\overline{A} ∩ C: The intersection of U \ A and C. This gives us {2, 6, 8}.

|\overline{A} ∩ C|: The cardinality (number of elements) of the intersection. Therefore, |\overline{A} ∩ C| = 3.

(b) B - \overline{C}:

\overline{C}: The complement of C, which includes all elements in U that are not in C. In this case, U \ C = {1, 3, 5, 7, 9, 10}.

B - \overline{C}: The difference between B and U \ C. This removes elements from B that are also in U \ C. Therefore, B - \overline{C} = {2, 4}.

|B - \overline{C}|: The cardinality of the difference. Hence, |B - \overline{C}| = 2.

(c) B ∪ A:

B ∪ A: The union of B and A, which includes all elements that are in either B or A or both. In this case, B ∪ A = {1, 2, 3, 4, 5, 7, 10}.

|B ∪ A|: The cardinality of the union. Therefore, |B ∪ A| = 7.

(d) \overline{B} ∩ (A - C):

\overline{B}: The complement of B, which includes all elements in U that are not in B. In this case, U \ B = {6, 7, 8, 9, 10}.

A - C: The difference between A and C. This removes elements from A that are also in C. Therefore, A - C = {1, 7, 10}.

\overline{B} ∩ (A - C): The intersection of U \ B and A - C. This gives us {7, 10}.

|\overline{B} ∩ (A - C)|: The cardinality of the intersection. Hence, |\overline{B} ∩ (A - C)| = 2.

(e) (A - B) ∩ (B - C):

A - B: The difference between A and B. This removes elements from A that are also in B. Therefore, A - B = {7, 10}.

B - C: The difference between B and C. As mentioned earlier, B - C = {2, 4}.

(A - B) ∩ (B - C)**: The intersection of A - B and B - C. Since no elements are shared between these sets, the intersection is empty.

|(A - B) ∩ (B - C)|**: The cardinality of the empty set is 0. Therefore, |(A - B) ∩ (B - C)| = 0.

Answer:

B. Stratified sampling, because there are specific subgroups to investigate.

Step-by-step explanation:

Stratified Sampling is a sampling method and is used when the population has subgroups with different characteristics. Random sampling is applied in each of the sub-groups proportional to their size and then these samples combined together to create sample of the study.

Since there are three towns with people from different occupations ( retirees,business owners, office workers), it is better to use stratified sampling method.

The correct answer is option B). Stratified sampling, because there are specific subgroups to investigate.

To determine the most appropriate sampling method, one must consider the composition of the population and the goal of the study. In this scenario, the population consists of three distinct groups: retirees in town A, business owners in town B, and office workers in town C. Each group represents a different stratum within the overall population of the county.

Stratified sampling is a method that divides the population into subgroups, or strata, based on certain characteristics, such as age, occupation, or town of residence in this case. This method ensures that each subgroup is represented in the sample in proportion to its size in the overall population. Here's why stratified sampling is the most appropriate method for this situation:

1. Representation: Stratified sampling ensures that each town's unique demographic is represented in the sample. This is important because each group may have different voting patterns.

2. Precision: By sampling each stratum separately, the estimates of the average number of votes for each candidate can be more precise because the variance within each subgroup is likely to be lower than the variance across the entire population.

3. Comparability: Stratified sampling allows for direct comparison between the different strata, which in this case are the three towns.

4. Efficiency: If the strata are chosen such that the variance within each stratum is minimized, the overall variance of the estimate can be reduced, leading to a more efficient estimate.

Now, let's consider the other options:

A. Simple random sampling: While this method is unbiased, it may not provide representation from each of the three towns in proportion to their population sizes. This could lead to an inaccurate estimate if one group's voting behavior is significantly different from the others.

C. Systematic sampling: This method involves selecting elements from the population at regular intervals. It can be difficult to implement if there is no clear ordering of the population, and it may not ensure representation from each town.

D. Cluster sampling: This method would be appropriate if the population were spread across a wide area and could be divided into clusters that are more convenient to sample. However, since the population is already divided into distinct groups within specific towns, stratified sampling is a better choice.

E. All the above sampling methods: While each method has its own merits, not all are equally suitable for this particular scenario. Stratified sampling is the most appropriate because it specifically addresses the heterogeneity of the population across the three towns.

Answer:

Tap A 3hrs

Tap B 6hrs

Step-by-step explanation:

Let the volume of the swimming pool be Xm^3.

Now, to get the appropriate volume, we know we need to multiply the rate by the time. Let the rate of the taps be R1 and R2 respectively, while the time taken to fill the swimming pool be Ta and Tb respectively.

x/Ta= Ra

x/Tb= Rb

X/(Ra + Rb)= 2

Ta = Tb - 3

From equation 2:

X = 2( Ra + Rb)

Substituting the values of Ra and Rb Using the first set of equations

X = 2( x/Ta + x/Tb)

But Ta = Tb - 3

1/2 = 1/(Tb - 3)+ 1/Tb

0.5 = (Tb + Tb-3)/Tb(Tb - 3)

At this juncture let’s say Tb = y

0.5 = (2y - 3)/y(y - 3)

y(y-3 ) = 4y - 6

y^2 -3y - 4y + 6 = 0

y^2 -7y + 6= 0

Solving the quadratic equation, we get y =

y = Tb = 6hrs or 1hr

We remove one hour as we know that Tap A takes 3hrs left than tap B and there is nothing like negative hours

Now, we get Ta by Tb -3 = 6 - 3 = 3hrs

Answer:

Step-by-step explanation:

u = 3.4

stdev = 0.35

n = 25

E = u = 3.4

SD = [tex]\frac{stdev}{\sqrt{n} } =\frac{0.35}{\sqrt{25} }[/tex] = 0.07

The calculation of the 68% population covers with 1 standard deviation is as follows:

u - SD = 3.4 - 0.07 = 3.33

u + SD = 3.4 + 0.07 = 3.47

Range = (3.33, 3.47)

The calculation of the 95% population covers within 2 standard deviations is as follows:

u - 2SD = 3.4 - 2(0.07) = 3.26

u + 2SD = 3.4 + 2(0.07) = 3.54

Range = (3.26, 3.54)

The calculation of the 99.7% population covers within 3 standard deviations is as follows:

u - 3SD = 3.4 - 3(0.07) = 3.19

u + 3SD = 3.4 + 3(0.07) = 3.61

Range = (3.19, 3.61)

From the information, observe that the shape of the distribution is symmetrical.

Therefore, the graph is as shows the attached image.

This shows that approximately:

68% of the observations will have mean between 3.33 and 3.47

95% of the observations will have mean between 3.26 and 3.54

99.7% of the observations will have mean between 3.19 and 3.61

Christopher Columbus landed on an island in the Bahamas, which he named San Salvador, on October 12, 1492, mistakenly believing he had reached Asia. This event is considered a pivotal moment in history, marking the beginning of European exploration and colonization of the Americas.

Christopher Columbus, an Italian explorer sponsored by Spain, embarked on his voyage to find a direct sea route to Asia by sailing west. Contrary to his expectations, he landed in the Americas on October 12, 1492. Columbus made landfall on an island in the Bahamas, which the native Lucayans called Guanahani. He renamed it San Salvador. Following this, Columbus explored other islands in the Caribbean, including an island he named Hispaniola (present-day Dominican Republic and Haiti), still believing he had reached the East Indies.

Columbus’ mistaken belief that he had landed in Asia led to the indigenous peoples he encountered being called “Indios”, which is the origin of the term “Indian” for native peoples of the Americas. Despite his error, Columbus's voyages are considered a pivotal moment in history, marking the beginning of widespread European exploration and colonization of the Americas.

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Answer:

D.  Function 2 has a greater rate of change by  

3

2

Step-by-step explanation:

Function 2 has a greater rate of change by  

3

2

m =  

y2 − y1

x2 − x1

Function 1 has a slope of  

1

2

.

x-int = (−4, 0)

y-int = (0, 2)

m =  

2 − 0

0 − (−4)

=  

2

4

=  

1

2

Function 2 has a slope of 2.

m =  

5 − 3

3 − 2

=  

2

1

= 2

thus,

2 −  

1

2

=  

4

2

−  

1

2

=  

3

2

Answer:

[tex]2\sqrt {10}[/tex]

Step-by-step explanation:

Given:

[tex]x=3\sqrt 5[/tex]

[tex]y=\sqrt 5[/tex]

As seen from the triangle, the triangle is a right angled triangle. Two sides of the triangle are given and we are asked to find the third side.

'x' is the hypotenuse as this side is opposite side to the right angled.

'y' and 'z' are the two legs of the triangle.

Now, using pythagoras theorem,

[tex]x^2=y^2+z^2\\\\(3\sqrt 5)^2=(\sqrt 5)^2+z^2\\\\9\times 5=5+z^2\\\\45-5=z^2\\\\40=z^2\\\\z=\sqrt {40}\\\\z=2\sqrt {10}[/tex]

Therefore, the measure of the side 'z' is [tex]2\sqrt {10}[/tex].

Hence, the third option is correct.

Answer:

The probability of selecting a red car off the lot is 0.231.

Step-by-step explanation:

Given:

Number of white cars = 25

Number of blue cars = 15

Number of red cars = 21

Number of black cars = 30

We need to find the probability of selecting a red car off the lot.

Solution:

First we will find the Total number of cars in the lot.

Now we can say that;

Total number of cars in the lot is equal to sum of Number of white cars and Number of blue cars and Number of red cars and Number of black cars.

framing in equation form we get;

Total number of cars in the lot = [tex]25+15+21+30 = 91[/tex]

Now to find the probability of selecting a red car off the lot we will divide Number of red cars by Total number of cars in the lot.

framing in equation form we get;

P(red) = [tex]\frac{21}{91}=0.2307[/tex]

Rounding to three decimals we get;

P(red) = 0.231

Hence The probability of selecting a red car off the lot is 0.231.

The probability of selecting a red car off the lot, rounded to three decimals, is 0.231.

First, we need to find the total number of cars on the lot by adding up the number of cars of each color:

 Total number of cars = Number of white cars + Number of blue cars + Number of red cars + Number of black cars

Total number of cars = 25 + 15 + 21 + 30

Total number of cars = 91

 Next, we find the probability of selecting a red car by dividing the number of red cars by the total number of cars:

Probability of selecting a red car = Number of red cars / Total number of cars

Probability of selecting a red car = 21 / 91

To round to three decimals, we perform the division:

 Probability of selecting a red car = 0.2308

Rounded to three decimals, the probability is 0.231.

Answer:

1, 2, and ±i√8

Step-by-step explanation:

0 = x⁴ − 3x³ + 10x² − 24x + 16

Using grouping:

0 = x⁴ − 3x³ + 2x² + 8x² − 24x + 16

0 = x² (x² − 3x + 2) + 8 (x² − 3x + 2)

0 = (x² + 8) (x² − 3x + 2)

0 = (x² + 8) (x − 1) (x − 2)

The roots are 1, 2, and ±i√8.

Answer:

The dimensions of poster are 32.5 in wide and 40.5 in tall.

Step-by-step explanation:

Given:

A poster is 8 in taller than it is wide.

It is mounted on a backing board that provides a 2 in border on each side of the poster.

The area of the backing board is 308 in².

Now, to find the dimensions of the poster.

Let [tex]x[/tex] be the length of the poster.

And [tex]y[/tex] be the width of the poster.

As given, poster is 8 in taller than it is wide.

So,

[tex]x=y+8[/tex]   ......(1)

Area = 308 in².

So, it is mounted on a backing board that provides a 2 in border on each side of the poster.

According to question:

[tex]2\times (2(y+4))+2\times (2\times x)=308[/tex]

Now. substituting the value from equation (1) in the place of [tex]x[/tex] we get:

[tex]2\times (2y+8)+2(2\times (y+8))=308[/tex]

[tex]2\times (2y+8)+2(2y+16)=308[/tex]

[tex]4y+16+4y+32=308[/tex]

[tex]8y+48=308[/tex]

Subtracting both sides by 48 we get:

[tex]8y=260[/tex]

Dividing both sides by 8 we get:

[tex]y=32.5\ in.[/tex]

The width of the poster = 32.5 in.

Now, substituting the value of [tex]y[/tex] in equation (1):

[tex]x=y+8[/tex]

[tex]x=32.5+8[/tex]

[tex]x=40.5\ in.[/tex]

Length of the poster = 40.5 in.

Therefore, the dimensions of poster are 32.5 in wide and 40.5 in tall.

Answer:the cost of one child's ticket is $6

the cost of one adult ticket is $9

Step-by-step explanation:

Let x represent the cost of one child's ticket

Let y represent the cost of one adult ticket.

Tickets for a minor league baseball game for an adult and two children cost a total of $21. This means that

2x + y = 21 - - - - - - - - - - 1

The adult ticket is three dollars more than a child's ticket. This means that

y = x + 3

Substituting y = x + 3 into equation 1, it becomes

2x + x + 3 = 21

3x + 3 = 21

3x = 21 - 3 = 18

x = 18/3 = 6

y = x + 3 = 6 + 3

y = 9