Answer:

Step-by-step explanation:
The formula of a Surface Area of a rectangular prisms:

<em>l</em><em> - length</em>
<em>w</em><em> - width</em>
<em>h</em><em> - height</em>
<em />
We have:

Substitute:

Answer:
a
Step-by-step explanation:
42 can be
1 x 42, or
2 x 21, or
3 x 14, or
6 x 7 .
Answer:
28 percent
Step-by-step explanation: