help me with this algaberic expressions with extolments

Answer:
800 inches cubed
Step-by-step explanation:
Multiply 20 x 20 x 20 to get 800.
:D
Answer: 8000 inches squared.
Step-by-step explanation:
I multiplied the length three times as the formula directed. Then, I looked at the choices given and one fit the match. 8000 square inches!
V=s^3
V=20•20•20
V=8000