Question

What is the surface area of a rectangular prism with a base length of 9 yd, a base width of 7 yd, and a height of 4 yd?

A.
252 yd2

B.
127 yd2

C.
254 yd2

D.
504 yd2

Answer 1

@sleepyjess

Answer 2

Do you know the formula for surface area?

Answer 3

All sides added together?

Answer 4

Wait, we didn't finish the last question...

Answer 5

We didn't?

Answer 6

No

Answer 7

We can do this and then go back to the other one, or just go back to the other one now

Answer 8

Ok.

Answer 9

9*7*4?

Answer 10

SA = 2(wl + hw + hl)

Answer 11

What? Can you walk me through it with the numbers?

Answer 12

base length of 9 yd, a base width of 7 yd, and a height of 4 yd

Answer 13

Ok..

Answer 14

l = 9
w = 7
h = 4

Answer 15

So.. It's 2*7*9+4*7+4*9?

Answer 16

Everything but the 2 needs to be in parentheses

Answer 17

How would I put that in my calculator?

Answer 18

It's simple enough to multiply in your head...

Answer 19

I like to use my calculator just because.

Answer 20

Or just multiply each thing individually, add them all up, and multiply by 2

Answer 21

Do you know PEMDAS?

Answer 22

Parenthesees, exponents, multiplication, division, addition, subtraction

Answer 23

Okay, just use that

Answer 24

Why does this have to be so difficult?

Answer 25

It isn't... it's just multiplying and adding..

Answer 26

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