Question

Can someone check my work?

I have to calculate the surface area of a rectangular prism.

The rectangular prism is 7in for length 1inch in height and 4in width
I used the formula A = 2 (wh+lw+lh) and got 43inches

Answer 1

Surface area = 2LW + 2(L+W)H.
Try again.

Answer 2

for a rectangular prism

Answer 3

actually hold on

Answer 4

Yea try again.

Answer 5

But it's the same thing, don't worry

Answer 6

hats the same thing

Answer 7

Yes the two formulas are the same but you need to try it again because your answer is incorrect.

Answer 8

What did I do wrong

Answer 9

I'm not sure, but just use your formula and try it again. You will get a different answer:)

Answer 10

What answer did you get?

Answer 11

\[2((4 \times 1)+(7 \times 4)+ (7 \times 1))\]
What does that give you?

Answer 12

78?

Answer 13

There you go:)

Answer 14

Thank you I no what I did wrong

Answer 15

Perfect.