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What is your question? @nightcore144
I sent a picture... Let me try again....
Show some work of your own, please. You can't have NO idea.
I'll start you off for number 5. So for number 5, what shapes do you see?
A rectangle and a circle.
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?
Area equals bh
Right, so do you see the base and height of this rectangle?
the base is 36 in and the height is 60 in
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?
36 times 60 is 2160. the other two numbers we can multiply is 18 and 1/2
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?
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?
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?
Pie equals r 2
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
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?
divide 1/2 ?
You wouldn't divide by 1/2, you would do the opposite of division, which is?
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?
B doesn't have 1/2 so we can take that answer choice out right ?
Yes, we can take B out. Good find
So it would be A ?
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
Thank you :)