Hi I'm not too sure how this works so would appreciate if someone could explain how to tackle these questions and what indices rules are used to solve this problem.

Question: Use the laws of exponents to simplify;

1. a^3 / a(a^2)^-1 (a to the power of 3, divided by a times, brackets a to the power of 2, close brackets, to the power of minus 1).

2. Square root of z^4 (z to the power of 4)

Sorry if I have'nt writtern them out in a proper manner.