How does 64^-2/3 = 1/16= 0.0625
64 ^ (-2/3) we have the property that a^(-m) = 1 / a^m
So we can write 64^(-2/3) as 1 / 64^(2/3)
And we can write this as 1 / (64^1/3)^2 = 1 / (3√64)^2 = 1 / (4)^2 = 1 / 16 = 0.0625
