Question

Simplify. Rewrite the expression in the form of 5^n. What is 5^-5\5^8.

Answer 1

$\cfrac{5^{-5}}{5^8} =5^{-5-8}=5^{-13}$

Answer 2

remember that $\frac{x^m}{x^n}=x^{m-n}$

so
$\frac{5^{-5}}{5^8}=5^{-5-8}=5^{-13}$