Question

Help please ?

Answer 1

What is your question? @nightcore144

Answer 2

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

Answer 3

Okay.

Answer 4

I sent the photo again

Answer 5

@AihberKhan

Answer 6

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

Answer 7

@FortyTheRapper

Answer 8

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

Answer 9

A rectangle and a circle.

Answer 10

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?

Answer 11

Area equals bh

Answer 12

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

Answer 13

the base is 36 in and the height is 60 in

Answer 14

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?

Answer 15

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

Answer 16

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?

Answer 17

Yes.

Answer 18

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?

Answer 19

D

Answer 20

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?

Answer 21

Pie equals r 2

Answer 22

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

Answer 23

oh.

Answer 24

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?

Answer 25

divide 1/2 ?

Answer 26

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

Answer 27

Multiply

Answer 28

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?

Answer 29

18

Answer 30

Yep!

Answer 31

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

Answer 32

Yes, we can take B out. Good find

Answer 33

So it would be A ?

Answer 34

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

Answer 35

Thank you :)

Answer 36

Anytime!