Sporting goods company sells tents in two styles, shown below. The sides and floor of each tent are made of nylon. Which tent requires less nylon to manufacture? Use 3.14 for pi and round to the hundredths place.

Answers

Answer 1

Missing portion of the question:

Question has missing the images for both type of tents hence the lengths were also missing which is attached in the picture.

Answer:

Tunnel Tent requires less nylon as its area (214.80ft²) is less than the area of Pup tent (247.40ft²)

Step-by-step explanation:

Pup Tent:

Area for Pup Tent: (Perimeter)(Height) + 2 (Area of front triangular side)

Perimeter=sum of all sides = 8+8+8=24

Height = 8

Area of Triangle = (1/2) length * height

length=8

height can be calculated by Pythagorean Theorem:

hyp²=base²+perp²

height = perp=4√3

So,

Area of Triangle = (1/2) length * height

=27.7

Hence,

Area for Pup Tent: (Perimeter)(Height) + 2 (Area of front triangular side)

=(24)(8)+(2)(27.7)

=247.40m²

Tunnel Tent:

Area of tunnel tent = πrh + πr² + 2rh

π=constant=3.14

r=radius=4

h=height=8

Area of tunnel tent = πrh + πr² + 2rh

=(3.14)(4)(8)+(3.14)(4)²+2(4)(8)

=214.80m²

Sporting Goods Company Sells Tents In Two Styles, Shown Below. The Sides And Floor Of Each Tent Are Made

Related Questions

(22 POINTS)

Which graph represents the function below?

Answers

Answer:

The first graph

Step-by-step explanation:

From the definition of [tex]h[/tex] we can see that:

                                 [tex]h(2)=-3\cdot 2+2 = -6+2=-4[/tex]

So, we can eliminate the third answer.

Now we can take for example [tex]x=4[/tex]:

From the definition of [tex]h[/tex] we can see that:

                                   [tex]h(4)=\frac{1}{2}\cdot 4-4 = 2-4=-2[/tex]

If we take a look at the two remanining graphs we can see that at the first graph indeed it is h(4)=-2,and on the second graph it is h(4)=-6

So, the correct answer is the first graph

Use the formula for the probability of the complement of an event. A coin is flipped 4 times. What is the probability of getting at least 1 tail?

Answers

Answer: 15/16

Step-by-step explanation:

There will be 16 outcomes for 4 coins=2^4

Probability of only head is : P(C)=1/16

P(C) + P(C') = 1

P(C') = 1 - P(C)

P(C') = 1 - 1/16

Take the l.c.m

P(C') = (16-1) / 16

P(C') = 15/16

So the probability of getting at least 1 tail is 15/16

Answer:

D 0.94

Step-by-step explanation:

when solved the answer is 15/16. This equals 0.9375 which rounded to the second decimal  = 0.94

Water is withdrawn from a conical reservoir, 8 feet in diameter and 10 feet deep (vertex down) at the constant rate of 5 ft³/min. How fast is the water level falling when the depth of the water in the reservoir is 5 ft? ([tex]V = \frac{1}{3} \pi r^2h[/tex]).

Answers

Answer:

Water level in the reservoir is falling at the rate of 0.398 ft per minute.

Step-by-step explanation:

From the figure attached,

Water level in the reservoir has been given as 10 feet and radius of the reservoir is 4 feet.

Let the level of water in the reservoir after time t is h where radius of the water level becomes r.

ΔABE and ΔCDE are similar.

Therefore, their corresponding sides will be in the same ratio.

[tex]\frac{r}{h}=\frac{4}{10}[/tex]

[tex]r=\frac{2}{5}h[/tex] --------(1)

Now volume of the water V = [tex]\frac{1}{3}\pi r^{2}h[/tex]

From equation (1),

V = [tex]\frac{1}{3}\pi (\frac{2}{5}h)^{2} h[/tex]

V = [tex]\frac{4\pi h^{2}\times h}{75}[/tex]

[tex]\frac{dV}{dt}=\frac{4\pi }{75}\times \frac{d}{dt}(h^{3})[/tex]

[tex]\frac{dV}{dt}=\frac{4\pi }{75}\times (3h^{2})\frac{dh}{dt}[/tex]

[tex]\frac{dV}{dt}=\frac{12\pi h^{2}}{75}\times \frac{dh}{dt}[/tex]

Since [tex]\frac{dV}{dt}=5[/tex] feet³ per minute and h = 5 feet

[tex]5=\frac{12\pi (5)^{2}}{75}\times \frac{dh}{dt}[/tex]

[tex]5=4\pi \frac{dh}{dt}[/tex]

[tex]\frac{dh}{dt}=\frac{5}{4\pi}[/tex]

[tex]\frac{dh}{dt}=0.398[/tex] feet per minute

Therefore, water level in the reservoir is falling at the rate of 0.398 feet per minute.

A certain car costs $11,595 before taxes are added. Taxes are $860 and license tags cost $95. What is the overall tax rate (to the nearest tenth)?

A. 0.8%
B. 7.4%
C. 8.2%
D. 12.1%

Answers

Answer:

The answer is B)7.4%

Step-by-step explanation:

Pure cost of the car is 11595$. It is stated that taxes costs 860$ for the car. To find the overall tax rate we need to simply divide tax value to car original cost.

[tex]860/11595=0.074[/tex]

Jayden has some dimes and some quarters. He has at most 25 coins worth at least $4.60 combined. If Jayden has 7 dimes, determine all possible values for the number of quarters that he could have.​

Answers

Answer:

16,17,18

Step-by-step explanation:

\underline{\text{Define Variables:}}

Define Variables:

May choose any letters.

\text{Let }d=

Let d=

\,\,\text{the number of dimes}

the number of dimes

\text{Let }q=

Let q=

\,\,\text{the number of quarters}

the number of quarters

\text{\textquotedblleft at most 25 coins"}\rightarrow \text{25 or fewer coins}

“at most 25 coins"→25 or fewer coins

Use a \le≤ symbol

Therefore the total number of coins, d+qd+q, must be less than or equal to 25:25:

d+q\le 25

d+q≤25

\text{\textquotedblleft at least \$4.60"}\rightarrow \text{\$4.60 or more}

“at least $4.60"→$4.60 or more

Use a \ge≥ symbol

One dime is worth $0.10, so dd dimes are worth 0.10d.0.10d. One quarter is worth $0.25, so qq quarters are worth 0.25q.0.25q. The total 0.10d+0.25q0.10d+0.25q must be greater than or equal to \$4.60:$4.60:

0.10d+0.25q\ge 4.60

0.10d+0.25q≥4.60

\text{Plug in }\color{green}{7}\text{ for }d\text{ and solve each inequality:}

Plug in 7 for d and solve each inequality:

Jayden has 7 dimes

\begin{aligned}d+q\le 25\hspace{10px}\text{and}\hspace{10px}&0.10d+0.25q\ge 4.60 \\ \color{green}{7}+q\le 25\hspace{10px}\text{and}\hspace{10px}&0.10\left(\color{green}{7}\right)+0.25q\ge 4.60 \\ q\le 18\hspace{10px}\text{and}\hspace{10px}&0.70+0.25q\ge 4.60 \\ \hspace{10px}&0.25q\ge 3.90 \\ \hspace{10px}&q\ge 15.60 \\ \end{aligned}

d+q≤25and

7+q≤25and

q≤18and

 

0.10d+0.25q≥4.60

0.10(7)+0.25q≥4.60

0.70+0.25q≥4.60

0.25q≥3.90

q≥15.60

\text{The values of }q\text{ that make BOTH inequalities true are:}

The values of q that make BOTH inequalities true are:

\{16,\ 17,\ 18\}

{16, 17, 18}

Final answer:

Jayden must have at least 16 quarters in order to have at most 25 coins worth at least $4.60 combined.

Explanation:

Let's assume Jayden has x quarters. Since Jayden has 7 dimes, he has a total of 7 + x coins. The value of a dime is $0.10, so the value of the dimes is 7 × $0.10 = $0.70.

The value of a quarter is $0.25, so the value of the quarters is x × $0.25 = $0.25x. The total value of all the coins is at least $4.60, so we have the equation:

$0.70 + $0.25x ≥ $4.60.

Simplifying the equation, we get:

$0.25x ≥ $4.60 - $0.70

$0.25x ≥ $3.90

x ≥ $3.90 / $0.25

x ≥ 15.6

Since we can't have a fraction of a coin, Jayden must have at least 16 quarters in order to have at most 25 coins worth at least $4.60 combined.

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You go out to pick blueberries and black berries. You know that to make a black and blue pie, you need to have 5 blueberries for every 2 blackberries you pick. If an entire pie has 140 berries, the pie contains_____ blueberries and ______ blackberries.

Answers

Answer:

100 blueberries and 40 blackberries

Step-by-step explanation:

Multiply each by 20 and you have 5 x 20 = 100 and 2 x 20 = 40

Lucy's Lunch and Latte has found that customers are put off by the local tourism tax of 9% that is added to their bill. If Lucy decides to cover the tax herself, rather than adding it to the customer's bill, what percent will the customer see in savings? Write your answer as a percent rounded to the nearest tenth. (Hint: the answer is not 9%.)

Answers

Answer:

Customer will save 8.3%.

Step-by-step explanation:

Let the amount of bill paid by the customers = $x

Local tourism tax = 9%

Total amount of bill including local taxes

= (x + 9% of x)

= x + 0.09x

= 1.09x

If Lucy decides to pay the tax portion of the bill = 0.09x

Then percentage saving by the customer = [tex]\frac{\text{Taxes on bill}}{\text{Bill amount including tax}}\times 100[/tex]

= [tex]\frac{0.09x}{1.09x}\times 100[/tex]

= 8.26%

≈ 8.3%

Therefore, customer will see 8.3% saving.

Suppose that a newspaper predicted that Candidate A would defeat Candidate B in a certain election. They conducted a poll of telephone directories with a response rate of 24​%. On the basis of the​ results, the newspaper predicted that Candidate A would win with​ 57% of the popular vote.​ However, Candidate B won the election with about​ 62% of the popular vote. At the time of this​ poll, most households with telephones belonged to the party of Candidate A. Name two biases that led to this incorrect prediction.
A. Sampling bias: Using an incorrect frame led to under-coverage.
Response bias: The way the poll was administered showed bias.
B. Non-response bias: The low response rate caused bias.
Sampling bias: Using an incorrect frame led to undercoverage.
C. Non-response bias: The low response rate caused bias.
Response bias: The way the poll was administered showed bias.

Answers

Answer: B, non response bias, and sampling bias

Step-by-step explanation:

Non response bias is when there is a huge difference between people that responded or took part in the polls and people that didn't respond, since we are told the response rate was 24% and sampling bias because it is said that most people using telephones belong to the party of candidate A, so using a telephone poll makes the sampling biased

Final answer:

The incorrect prediction occurred due to non-response bias, where not all opinions were represented due to a low response rate, and sampling bias, where the sampling method resulted in an under-representation of the whole population.

Explanation:

In this election prediction scenario, two types of biases influenced the incorrect prediction. The first is a non-response bias. Only 24% of people responded to the poll which means the opinions of the remaining 76% of people are not represented in the survey results. This can cause a distortion in the data and result in an inaccurate prediction. Secondly, there was a sampling bias present. The poll was conducted via telephone directories, and at the time, most telephone households were supportive of Candidate A's party. This means that the sample frame does not accurately represent the target population, leading to an 'undercoverage' issue. As a result of these biases, the newspaper predicted that Candidate A would win, but in fact, Candidate B won with about 62% of the popular vote.

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In the figure, . Find x and y.
Question 3 options:
a. x = 32, y = 137
b. x = 38, y = 151
c. x = 52, y = 137
d. x = 137, y = 52

Answers

Answer:

The answer to your question is x = 52° and y = 137°

Step-by-step explanation:

Process

1.- Find the value of x using the large right triangle, remember that the sum of the internal angles in a triangle equals 180°.

   x  + 38 + 90 = 180

  x = 180 - 90 - 38

  x = 52°

2.- To find y, we notice that x and y -9 are supplementary angles so their sum gives 180°.

           x + y - 9 = 180

Substitution

          52 + y - 9 = 180

          y = 180 + 9 - 52

          y = 137°

   

Condo living room is in the shape of a rectangle has a area of three 60 ft.² the width of the living room is 58 it's what what is the length of the living room

Answers

Question is not proper, Proper question is given below;

Consuelo's living room is in the shape of a rectangle and has an area of 360 square feet. The width of the living room is  [tex]\frac{5}{8}\ ft[/tex] its length. What is the length of the living room?

Answer:

Length of the living room is 24 feet.

Step-by-step explanation:

Given:

Area of the living room = [tex]360 \ ft^2[/tex]

We need to find the length of the living room.

Solution:

the length of the living room be 'l'.

Given:

Width of the living room [tex]\frac{5}{8}\ ft[/tex] of it length.

width [tex]w= \frac{5}{8}l[/tex]

It has been given that living room is in rectangular format.

So we can say that;

Area of living room is equal to length of the living room times width of the living room.

framing in equation form we get;

[tex]l\times w=360\\\\l\times\frac{5}{8}l=360\\\\\frac{5}{8}l^2=360[/tex]

Now Multiplying both side by [tex]\frac{8}{5}[/tex] we get;

[tex]\frac{5}{8}l^2\times\frac{8}{5}=360\times\frac{8}{5}\\\\l^2= 576[/tex]

Taking square root on both side we get;

[tex]\sqrt{l^2} =\sqrt{576} \\\\l=24 \ ft[/tex]

Hence Length of the living room is 24 feet.

Luke's basketball team went to an amusement park at the end of the season. The cost of the admission for 5 coaches and 12 players was 407.50. The admission cost for each coach was 27.50. What was the admission cost for each player?

Answers

Answer:the admission cost for each player is $22.5

Step-by-step explanation:

Let x represent the admission cost for each player.

Luke's basketball team went to an amusement park at the end of the season. The cost of the admission for 5 coaches and 12 players was 407.50. The admission cost for each coach was 27.50. This means that

5 × 27.50 + 12x = 407.5

137.5 + 12x = 407.5

Subtracting 137.5 from the left hand side and the right hand side of the equation, it becomes

12x + 137.5 - 137.5= 407.5 - 137.5

12x = 270

Dividing the left hand side and the right hand side of the equation by 12, it becomes

12x/12 = 270/12

x = 270/12 = 22.5

Answer:

$22.5

Step-by-step explanation:

To find the cost for each player, first, let us find the cost of all coaches, then the rest will be for the players

Step 1: Multiply the cost for 1 coach by 5

[tex]27.50 \times 5 = 137.5[/tex]

Step 2: Subtract the result from the total amount of both players and coaches

[tex]407.50 - 137.5 = 270[/tex]

Now we have found the total cost of all 12 players. Next up, we need to find the cost of just one player

Step 3: Divide the result by the number of players

[tex]270 \div 5[/tex]

[tex]= \frac{270}{5}[/tex]

[tex]= 22.5[/tex]

The admission cost for each player was 22.5 dollars.

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Answer the following questions about the problem above. Write in complete sentences to get full credit.

1. What is the slope for section "d" of Mrs. Washington's commute.

2. What does it mean that the slope is negative in context of the problem?

3. Why are the slopes different over different intervals?

4. How long does it take Mrs. Washington to get home? How did you know this?

Answers

Answer:

1. 20-15/0-8= -5/8

2. In a positive slope the Y value increases as the X value increases (as the line moves towards the right it gets higher). In a negative slope the Y value decreases as the X value increases (as the line moves towards the right it gets lower). (Question 3 is in here)

4. It depends on the amount of time she's been driving

For a two day rental at thd surf shop, it cost $45 to rent a surfboard and $60 to rwnt a paddleboard. On a certain weekend, the surf shop rented 44 total surfboards and paddleboards and made $2265. How many paddle boards were rented?

Answers

Answer: 19 paddle boards were rented.

Step-by-step explanation:

Let x represent the number of surfboards that were rented.

Let y represent the number of paddleboards that were rented.

A total of 44 surfboards and paddleboards were rented. It means that

x + y = 44

For a two day rental at the surf shop, it cost $45 to rent a surfboard and $60 to rent a paddleboard.

The total cost of surfboards and paddleboards rented was $2265. This means that

45x + 60y = 2265 - - - - - - - - - 1

Substituting x = 44 - y into equation 1, it becomes

45(44 - y) + 60y = 2265

1980 - 45y + 60y = 2265

- 45y + 60y = 2265 - 1980

15y = 285

y = 285/15 = 19

x = 44 - y = 44 - 19

x = 25

Part a During second period, Janet completed a grammar worksheet. ​She got 14 questions correct and 42 questions incorrect. What percentage did Janet get correct?

Answers

The percentage of correct answers out of the total question is 25%.

What is the Percentage?

The Latin phrase "per centum," which means "by the hundred," is where the English word "percentage" comes from. Percentage segments are those with a numerator of 100. In other words, it is a connection where the whole is always deemed to be valued 100.

As per the given information in the question,

The number of incorrect questions = is 42

The number of Correct questions = 14

So, the total number of questions is,

42 + 14 = 56

Let the percentage of correct questions be x.

x = 14/56 × 100

x = 1400/56

x = 25%  

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The systematic use of critical reasoning to try to find answers to fundamental questions about reality, morality, and knowledge is called__________

Answers

Answer:

Metaphysics

Step-by-step explanation:

Metaphysics is a system of reasoning or process that is often employed to find answers through examining fundamental nature of reality, the relationship between minds and also knowledge.

The systematic use of critical reasoning to try to find answers to fundamental questions about reality, morality, and knowledge is called philosophy.

The systematic use of critical reasoning to try to find answers to fundamental questions about reality, morality, and knowledge is called philosophy.

Philosophy is the discipline that seeks to explore and understand the fundamental aspects of existence, including the nature of reality, the principles of ethics and morality, and the limits of human knowledge. It involves the rigorous examination of concepts, arguments, and ideas to gain deeper insights into the nature of the world and our place in it.

Philosophers engage in critical thinking and analysis to address questions related to the meaning of life, the nature of truth, the basis of ethics, and the foundations of human understanding. Through philosophical inquiry, individuals seek to develop a deeper and more comprehensive understanding of the complex issues that shape our lives and society.

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When it is 2:00 p.m. in New York City, it is 9:00 PM in Athens. If you leave New York at 7:30 a.m. on Wednesday and fly to Athens over the course of 13 hours and 45 minutes, what time will it be in Athens when you land?a. 2:30 p.m. Wednesdayb. 9:15 p.m. Wednesdayc. 4:15 a.m. Thursdayd. 1:15 p.m. Thursday

Answers

Answer:

option (c) 4:15 a.m. Thursday

Step-by-step explanation:

Time difference in  New York City and Athens = 7 hours

Now,

The flight leaves at 7:30 a.m on Wednesday i.e 7:30 hrs

Therefore,

the time in Athens at the time of leaving of flight =  7:30 hrs + 7 hours

= 14 : 30 hrs i.e 2 : 30 pm on Wednesday

now,

after the 13 hours and 45 minutes of flight time in Athens i.e

= 14 : 30 + 13 : 45

= 28 : 15   i.e 1 day and 4 : 15 hrs

This means Flight will land at 4 : 15 a.m on Thursday

Hence,

option (c) 4:15 a.m. Thursday

Answer:

C

Step-by-step explanation:

4:15am Thursday

A smoothie stores sell 3 strawberry smoothies and 5 banana smoothies for a total cost of 27.50 .The strawberry smoothie cost 0.50 more than the banana smoothies

Answers

Answer:

Cost of each banana smoothies is 3.25 and Cost of each Strawberry smoothie is 3.75.

Step-by-step explanation:

Given:

Number of strawberry smoothies =3

Number of banana smoothies = 5

Total cost = 27.50

We need to find cost of strawberry cookies and cost of banana cookies.

Solution:

Let cost of each banana smoothies be 'x'.

Given:

The strawberry smoothie cost 0.50 more than the banana smoothies.

So we can say that;

Cost of each Strawberry smoothie = [tex]0.5+x[/tex]

Now we can say that Total cost is equal to sum of Number of strawberry smoothies multiplied by Cost of Strawberry smoothie and Number of banana smoothies multiplied by cost of banana smoothies.

framing in equation form we get;

[tex]3(x+0.5)+5x=27.5[/tex]

Applying distributive property we get;

[tex]3x+1.5+5x=27.5\\\\8x+1.5=27.5[/tex]

Subtracting both side by 1.5 we get;

[tex]8x+1.5-1.5=27.5-1.5\\\\8x=26[/tex]

Dividing both side by 8 we get;

[tex]\frac{8x}{8}=\frac{26}{8}\\\\x=3.25[/tex]

Cost of each banana smoothies = 3.25

Cost of each Strawberry smoothie = [tex]0.5+x=0.5+3.25=3.75[/tex]

Hence Cost of each banana smoothies is 3.25 and Cost of each Strawberry smoothie is 3.75.

Answer:

the slope is 4

the area A of a triangle is given by the formula A=1\2 bh where b is the base and h is the height : solve the formula for the height

Answers

Answer:

h=2A/b

Step-by-step explanation:

A=1/2bh

Isolate h by moving 1/2 and b to the other side of the equation.

Divide each side by 1/2,which is multiplying by 2, which gives you 2A=bh.Now divide each side by b, which gives you 2A/b=h. Turn it around.

2A/b=h becomes h=2A/b

Answer:

h=2A/b

Step-by-step explanation:

Point X is at 2/3 on a number line on the number line point why is the same distance from 0 is point X but has a numerator of 8 what is the denominator of the fraction at point why

Answers

Answer:

Denominator

x = 12

Step-by-step explanation:

Let x be the denominator of the fraction at point y.

Given:

Point X is at 2/3 on a number line from 0.

On the same line, point y is the same point from 0.

Numerator of the fraction at point y is 8.

We need to find the denominator of the fraction at point y.

Solution:

From the above statement the distance from 0 to point X and 0 to point Y is same, so point X is equal to Y.

[tex]\frac{2}{3} =\frac{8}{x}[/tex]

By cross multiplication.

[tex]x=\frac{8\times 3}{2}[/tex]

[tex]x= \frac{24}{2}[/tex]

[tex]x = 12[/tex]

Therefore, the denominator of the fraction at point y is 12.

Bianca and Meredith are sisters. Meredith's height is 23 of Bianca's height plus 32 inches. Meredith is 60 inches tall. A girl is sixty inches tall. Write an equation to find Bianca's height, x, in inches.

Answers

Answer:

Bianca's height = 42 inches

Step-by-step explanation:

Let x be the Bianca height.

Given:

Meredith height = 60 inches

We need to find the Bianca height.

Solution:

From the given statement the Meredith's height is [tex]\frac{2}{3}[/tex] of Bianca's height plus 32 inches, so the equation is.

Meredith's height = [tex]\frac{2}{3}(Bianca\ height)+32[/tex]

Substitute Meredith's height in above equation.

[tex]60=\frac{2}{3}x+32[/tex]

Now we solve the above equation for x.

[tex]\frac{2}{3}x=60-32[/tex]

[tex]\frac{2}{3}x=28[/tex]

By cross multiplication.

[tex]x=\frac{3\times 28}{2}[/tex]

28 divided by 2.

[tex]x= 3\times 14[/tex]

[tex]x=42\ in[/tex]

Therefore, the height of the Bianca is 42 inches.

With a short time remaining in the​ day, a delivery driver has time to make deliveries at 66 locations among the 99 locations remaining. How many different routes are​ possible? There are _________ possible different routes. ​(Simplify your​ answer.)

Answers

Answer: 197,443,926,105,102,399,225,573,693

Step-by-step explanation:

Here we use combination which is the selection of all or part of a set of objects or items without considering the order of selection.

Mathematically, The number of 'r' combinations from 'n' elements is given as :

nCr = n!÷((n-r)!r!)

From the question above :

n=99 r=66

99C66 = 99!÷((99-66)!66!)

99!÷(33!66!) = 197,443,926,105,102,399,225,573,693

There are 197,443,926,105,102,399,225,573,693 different possible routes.

An investigator reviewed the medical records of 200 children seen for care at Boston Medical Center in the past year who were between the ages 8 and 12 and identified 40 children with asthma. He also identified 40 children of the same ages who were free of asthma. Each child and their family were interviewed to assess whether there might be an association between certain environmental factors such as exposure to second-hand smoke. This study is an example of a:_______. a. randomized controlled trial. b. case-control study. c. cohort study. d. crossover trial.

Answers

Answer:

cohort study

Step-by-step explanation:

Given that an  investigator reviewed the medical records of 200 children seen for care at Boston Medical Center in the past year who were between the ages 8 and 12 and identified 40 children with asthma. He also identified 40 children of the same ages who were free of asthma. Each child and their family were interviewed to assess whether there might be an association between certain environmental factors such as exposure to second-hand smoke.

The objective of this experiment is to test the causes of the disease asthma and to find the risk factors and environment causing this disease.

So this cannot come under randomized control nor case control.

Cross over study is to put to two different environments two groups and study.  But here nothing is influenced actual environments are studied

Hence this comes under cohort study

Answer:

cohort study

Step-by-step explanation:

What is the fourth root of -16?

Answers

Answer:

The answer to your question is 2i

Step-by-step explanation:

                                             [tex]\sqrt[4]{-16}[/tex]

- Get the prime factors of -16

                                                  - 16   2

                                                   -  8  2

                                                   -  4  2

                                                   -  2  2

                                                       1

                                   16 = 2⁴

- Express the -16 as a power

                          [tex]\sqrt[4]{-2^{4}}  or   \sqrt[4]{2^{4}i^{2}}[/tex]

Remember that -1 = i²

- Get the fourth root of -16

                                         2i

                               

The perimeter of a square with side length $x$ units is equal to the circumference of a circle with radius 2 units. What is the value of $x$?

Answers

Answer:

  x = π

Step-by-step explanation:

The circumference of the circle is given by ...

  C = 2πr = 2π(2) = 4π

The perimeter of a square of side length x is given by ...

  P = 4x

You want the perimeter equal to the circumference, so ...

  4π = 4x

  π = x . . . . . . . divide by 4

The value of x is π.

The side length x of the square is the same as the radius of the circle, which is π units, because the perimeter of the square, 4x units, is set equal to the circumference of the circle, 4π units.

It is asked to determine the side length x of a square when its perimeter is equal to the circumference of a circle with radius 2 units.

To find the perimeter of a square, you multiply the side length by 4, since a square has four equal sides. Thus, the perimeter of the square is 4x units.

The formula for the circumference of a circle is [tex]C = 2\pi r,[/tex] where r is the radius of the circle.

Given that the radius is 2 units, the circumference of the circle would be [tex]2\pi (2) = 4\pi[/tex]units.

By setting the two equal to each other:

[tex]4x = 4\pi[/tex]

Divide both sides by 4 to isolate x:

[tex]x = \pi[/tex]

Therefore, the side length x of the square is π units.


Compute the following products.
a. (4x + 5)(4x - 5)
b. (4x + 5)2

Answers

a.16x square +40x+25

Let A be the set of students at your school and B the set of books in the school library. Let R₁ and R₂ be the relations consisting of all ordered pairs (a, b), where student a is required to read book b in a course, and where student a has read book b, respectively. Describe the ordered pairs in each of these relations.

a) R₁ ∪ R₂
b) R₁ ∩ R₂
c) R₁ ⊕ R₂
d) R₁ − R₂
e) R₂ − R₁

Answers

Answer:a) {(a,b)[a is required to read book b or has read book b]}

b) {(a,b)[a has read book b that he was required to read)]

c) {(a,b)[a is either required to read book b or has read it but he has not read both)]

d) {(a,b)[a is required to read book b and he is yet to read book b)]

e) {(a,b)[a has read book b that was not required)]

Step-by-step explanation: The answers is a description of the explanation

Final answer:

The question asks about various operations with the sets R₁ and R₂, which represent the students and the books they are required to read and have read respectively. It looks at the union, intersection, symmetric difference, and difference of these two sets in relation to each other, where variables 'A' and 'B' represent a student and a book respectively.

Explanation:

This is a question in set theory. We will be defining the different operations performed on the ordered pairs of two relations R₁ and R₂. Let's consider 'A' as a student studying in your school and 'B' be a book in the library, the ordered pairs (A, B) indicate the relationship between the student and the book.

R₁ ∪ R₂: Represents the union of the relations. This would contain all ordered pairs where 'A' is required to read 'B' (relation R₁) or 'A' has read 'B' (relation R₂).R₁ ∩ R₂: Represents the intersection of the relations. This would include all ordered pairs where 'A' is required to read 'B' (relation R₁) and 'A' has also read 'B' (relation R₂). In simpler terms, it's the books that students were required to read and they have read.R₁ ⊕ R₂: Represents the symmetric difference of the relations. This would contain ordered pairs where 'A' is either required to read 'B' or 'A' has read 'B', but not both.R₁ − R₂: Represents the difference of the relations. This includes all ordered pairs where a student 'A' is required to read a book 'B', but has not read it yet.R₂ − R₁: Represents the reverse difference of the relations. This set includes all ordered pairs where a student 'A' has read a book 'B' but was not required to read it for a course.

Learn more about Set Theory here:

https://brainly.com/question/27333813

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The length of the entire border of the Unites States is approximately 32,000 miles, 5 8 of which is coastline. How long is the coastline of the U.S., and how long are the land boundaries?

Answers

Answer:the coastline is 20000 miles.

The land boundaries are 12000 miles.

Step-by-step explanation:

The length of the entire border of the Unites States is approximately 32,000 miles.

5/8 of the entire length is the coastline. It means that the length of the coastline of the U.S would be

5/8 × 32000 = 20000 miles.

Therefore, the length of the boundaries of the US would be

32000 - 20000 = 12000 miles.

The inverse of a cosine function is the
function ___

arcsine

secant

arccosine

cosecant

Answers

Cosecant is the answer

Answer:

cosecant

Step-by-step explanation:

Inverse Cosine

cos-1

Cos-1

arccos

Arccos

The inverse function of cosine.

Basic idea: To find cos-1 (½), we ask "what angle has cosine equal to ½?" The answer is 60°. As a result we say cos-1 (½) = 60°. In radians this is cos-1 (½) = π/3.

More: There are actually many angles that have cosine equal to ½. We are really asking "what is the simplest, most basic angle that has cosine equal to ½?" As before, the answer is 60°. Thus cos-1 (½) = 60° or cos-1 (½) = π/3.

Details: What is cos-1 (–½)? Do we choose 120°, –120°, 240°, or some other angle? The answer is 120°. With inverse cosine, we select the angle on the top half of the unit circle. Thus cos-1 (–½) = 120° or cos-1 (–½) = 2π/3.

In other words, the range of cos-1 is restricted to [0, 180°] or [0, π].

Note: arccos refers to "arc cosine", or the radian measure of the arc on a circle corresponding to a given value of cosine.

Technical note: Since none of the six trig functions sine, cosine, tangent, cosecant, secant, and cotangent are one-to-one, their inverses are not functions. Each trig function can have its domain restricted, however, in order to make its inverse a function. Some mathematicians write these restricted trig functions and their inverses with an initial capital letter (e.g. Cos or Cos-1). However, most mathematicians do not follow this practice. This website does not distinguish between capitalized and uncapitalized trig functions.

 

 

See also

Inverse trigonometry, inverse trig functions, interval notation

1.) Simplify the expression.
sin ( u + π/2 )
a.) tan u
b.) sin u
c.) csc u
d.) cos u
e.) cot u

Answers

Answer:

[tex]sin ( u +\frac{\pi}{2} ) = cos (u)[/tex]

Step-by-step explanation:

Let us use the identity

sin(A+B)=  cos(A) sin(B)+cos (B) sin(A) to simplify the given expression

Then

[tex]sin(u + \frac{\pi}{2})= \cos \left(u\right)\sin \left(\frac{\pi }{2}\right)+\cos \left(\frac{\pi }{2}\right)\sin \left(u\right)[/tex]--------------------(1)

Here

[tex]cos (\frac{\pi}{2}) = 0\\[/tex]---------------------(2)

[tex]sin(\frac{\pi}{2})= 1[/tex]---------------------(3)

Substituting the values  in (1)

[tex]sin(u + \frac{\pi}{2})= \cos \left(u\right)(1)+(0)\sin \left(u\right)[/tex]

[tex]sin(u + \frac{\pi}{2})= \cos \left(u\right) + 0[/tex]

[tex]sin(u + \frac{\pi}{2})= \cos \left(u\right)[/tex]

Two physics students are doing a side competition during a game of bowling, seeing who can toss a ball with the larger momentum. The first bowler throws a 4.5 kg ball at 8.6 m/s. Part A A second bowler throws a 6.4 kg ball. What speed must she beat to win the competition?

Answers

Answer:

she should beat a speed of  v₂ = 6.04 m/s in order to win the competition

Step-by-step explanation:

Since the momentum p is defined as

p = m*v

where

m= mass of the ball

v= velocity of the ball

denoting 1 and 2 as the first and second bowler , then to reach the momentum of the first bowler

p₂=p₁

therefore

m₁*v₁ = m₂*v₂

v₂ = v₁ * (m₁/m₂)

replacing values

v₂ = v₁ * (m₁/m₂) =8.6 m/s * (4.5 kg/6.4 kg ball) = 6.04 m/s

then since the momentum p = m*v increases with increasing v (at constant m)  , she should beat a speed of  v₂ = 6.04 m/s in order to win the competition

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