Answer: C. Independent equations.
Hope tis helps you out.
<span>The total surface area is SA = 6 </span>×

;
SA = 6 ×

= 6 × 81 = 486

;
Answer:
21
Step-by-step explanation:
It might be 21/30 , hope it helps though :)
42%
------------------------------------------------------
Step-by-step explanation:
Below is an attachment containing the solution.