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3 years ago

14

Claire has a hot tub with a diameter of 7 feet. She wants to purchase a cover to protect the hot tub. What is the area of the co

ver? Use pi= 3.14 and round the answer to the nearest square foot.

2 answers:

aleksandr82 [10.1K]3 years ago

6 0

Answer:

its 38

Step-by-step explanation:

AVprozaik [17]3 years ago

6 0

Answer:

38

Step-by-step explanation:

i did the test.

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9.12*10 by the power of seven/3.2*10 by the power of 4

ivanzaharov [21]

Answer:

2.9184x10 to the power of 12

Step-by-step explanation:

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3 years ago

solve for x. round your answer to two decimal places. show your work for full credit. a right triangle is shown with the hypoten

Molodets [167]

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3 years ago

Tickets for a school carnival cost 10$ for adult and 5 for children. last Saturday carnival sold 170 tickets worth a total of $1

riadik2000 [5.3K]

70 adults and 100 children attended the carnival.

Step-by-step explanation:

Given,

Cost of each adult ticket = $10

Cost of each child ticket = $5

Total tickets sold = 170

Total revenue generated = $1200

Let,

Number of adults = x

Number of children = y

According to given statement;

x+y=170 Eqn 1

10x+5y=1200 Eqn 2

Multiplying Eqn 1 by 10

$10(x+y=170)\\10x+10y=1700\ \ \ Eqn\ 3$

Subtracting Eqn 2 from Eqn 3

$(10x+10y)-(10x+5y)=1700-1200\\10x+10y-10x-5y=500\\5y=500$

Dividing both sides by 5

$\frac{5y}{5}=\frac{500}{5}\\y=100$

Putting y=100 in Eqn 1

$x+100=170\\x=170-100\\x=70$

70 adults and 100 children attended the carnival.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

7 0

3 years ago

A large bottle of orange juice contains 400 mL of juice. A medium size bottle contains 60% as much. Find how many millilters are

telo118 [61]

Answer:

240 mL

Step-by-step explanation:

60% of 400 is 240 mL! Your Welcome!

7 0

3 years ago

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Mean birthweight is studied because low birthweight is an indicator of infant mortality. A study of babies in Norway published i

ANEK [815]

Answer: 20

Step-by-step explanation:

Formula to find the minimum sample size(n) when prior population standard deviation $(\sigma)$ is known.

$n=(\dfrac{z^c\times\sigma}{E})^2$ , where E = Margin of error , $z^c$ = Critical z-value for c confidence interval.

Given : E = 225 g , $\sigma=600$ g

Critical z value for 90% confidence = 1.645

Now, $n=(\dfrac{1.645\times600}{225})^2$

$n=(\dfrac{987}{225})^2$

$n=(4.38666666667)^2=19.2428444\approx20$

Hence, the required minimum sample size = 20

7 0

3 years ago