For this case we have the following expression:

When making multiplication, the first thing you should keep in mind is the following property:
Same basis, the exponents are added.
We have then:

Rewriting we have:
Answer:
The simplified expression is given by:
Answer:

Step-by-step explanation:

Add or subtract like terms.

Answer:
48 cubic units.
Step-by-step Explanation:

random cubic units
tower-stacked cubic units
x 
x 
#31
= - 8/-8
= 1
#32
= 28/7
= 4
#34 True
#35 True
#36 False
#37 False
#38 True