Respuesta :

Answer: 1/4

Explanation:

So 4 to the power of a to the power of -2 times 64 has to equal 4096.

That means the left side has to be (64)(64) as well which makes 4 to the power of a to the power of -2 = 64

64/4 = 16

16 = 1/a^2

a = 1/4