Help please ?

- anonymous

Help please ?

- Stacey Warren - Expert brainly.com

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- katieb

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- AihberKhan

What is your question? @nightcore144

- anonymous

I sent a picture... Let me try again....

- AihberKhan

Okay.

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## More answers

- anonymous

I sent the photo again

##### 1 Attachment

- anonymous

@AihberKhan

- tkhunny

Show some work of your own, please. You can't have NO idea.

- anonymous

@FortyTheRapper

- FortyTheRapper

I'll start you off for number 5.
So for number 5, what shapes do you see?

- anonymous

A rectangle and a circle.

- FortyTheRapper

Right on the rectangle part, but the circle is actually cut in half making it a semi-circle, right?
Now he wants to find the equation, which requires the areas. Would you know the area of a rectangle?

- anonymous

Area equals bh

- FortyTheRapper

Right, so do you see the base and height of this rectangle?

- anonymous

the base is 36 in and the height is 60 in

- FortyTheRapper

Right, so that gives us the (36 * 60) part. So far, all the answer choices have that, so we can't eliminate any of the choices yet.
Let's do that. In the problem, they give us two numbers to multiply together in the second sentence. Do you see those two numbers?

- anonymous

36 times 60 is 2160. the other two numbers we can multiply is 18 and 1/2

- FortyTheRapper

In this problem, we just need to find the equation, we don't have to find an answer, so we can keep it at (36 * 60)
For the other two numbers, he says each of the rooms 3 walls contains 8 windows. So 3 and 8 are the other two numbers we needed. You see where I got the 3 and 8 from?

- anonymous

Yes.

- FortyTheRapper

So we also have to multiply those two numbers, which means it would be (3 * 8)
Now we can eliminate one answer. Do you see which choice isn't formatted as (3*8) exactly?

- anonymous

D

- FortyTheRapper

Right! So now we have (3 * 8)(36 * 60). We also have A, B, and C left
So now, let's find the next part: the semi-circle. Let's first find the area of a regular circle first. Do you know what the area of a circle is?

- anonymous

Pie equals r 2

- FortyTheRapper

You have the right items, but the area wouldn't be pi = r^2, the pi would be multiplied, so you get area = pi * r^2

- anonymous

oh.

- FortyTheRapper

But we have a semi-circle, which is 1/2 of a circle.
Seeing that it's 1/2 of a circle, what should we do with the area of a circle to make it a semi?

- anonymous

divide 1/2 ?

- FortyTheRapper

You wouldn't divide by 1/2, you would do the opposite of division, which is?

- anonymous

Multiply

- FortyTheRapper

Correct, so multiplying we get 1/2 * pi * r^2
But they gave us the R of this circle. Do you see what it is?

- anonymous

18

- FortyTheRapper

Yep!

- anonymous

B doesn't have 1/2 so we can take that answer choice out right ?

- FortyTheRapper

Yes, we can take B out. Good find

- anonymous

So it would be A ?

- FortyTheRapper

Yes it would be A! Because it area is r^2 and A shows that with 18^2
C just shows an 18. Good job

- anonymous

Thank you :)

- FortyTheRapper

Anytime!

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