Here is a basic math question that most of you probably already know... But I have searched the net to try and find the answer and can't come up with anything.

The question:
write 4x4x4x4x4 as a power of 4.

answers:
                  4           5           
A) 4      B) 5      C) 4      D) 5
      5                                   4 

Guess i'm confused as to if the to the power # of goes on top or bottom.