C is the right answer. 54% is roughly half of the number. Just divide 168 by 2 ans you will have an estimation of your answer
704 is your answer
if all sides meaning the L,W,H are multiplied by 8
So you would get 8
8*8*8
Formula for the area of a circle: A = pi x r^2
Solve for the radius:
36pi = pi x r^2
r^2 = 36
r = 6 cm
Hope this helps! :)