24
Perimeter is amount out all sides added together.
The awnser is 367.38 to the 3rd power only if its volume but if its surface area then it would be to the 3rd power. do u get it?
I hope you can read this or see it and it helps,thanks bye bye.
Answer:

Step-by-step explanation:
<u>Step 1: Subtract 21 from both sides</u>



<u>Step 2: Divide 8 from both sides</u>



Answer: 