Answer:
16 a^8 = 16aaaaaaaa
Step-by-step explanation:
(4a^4)^2
We know (xy)^z = x^z y^z
4^2 a^4^2
16 a^4^2
We know a^b^c = a^(b*c)
16 a^(4*2)
16 a^8
