Answer: 81 mm^2
Step-by-step explanation: All the sides are the same length and area is just length * width so 9*9=81. You're welcome
Answer:
28.27
Step-by-step explanation:
For a cube,

The volume is the cube of the side length.


To raise a product to an exponent, raise each factor to the exponent.

To raise a power to a power, multiply powers.