Question

express 16^-2as a power with base 2

Answer 1

16^-2
=(2×2×2×2)^-2
=(2^4)^-2
=2^-8
or1/2^8

Answer 2

We know that,   16 =  2×2×2×2 = 2⁴

∴  16⁻² = (2⁴)⁻²

            = 2⁴ˣ⁽⁻²⁾

            =2⁻⁸ (answer)