i dont understand this question

A square root is the same as a fractional exponent. 2 to the second power is 4, so what root or fractional exponent would you need to bring 64 down to four. The cube root of 64 is 4, so the fractional exponent must be 1/3, so your answer is 1/3 since 4³=64. To put this into a better perspective, 4²=16, and 16^1/2=4.

2 to the second power   is   2^2 = 4

Sqrt (64) = 8                                            the fraction of 4 to 8   is 4/8 = 1/2

what fraction of the squareroot of 64 is 2 to the second power

\( a*\sqrt{64}=2^2\\ 8a=4\\ a=\frac{1}{2}\)