Question

Please help thanks!!

Answer 1

The answer is 1.) because when dividing you subtract the exponents.

Answer 2

$\bf ~~~~~~~~~~~~\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} \qquad \qquad \cfrac{1}{a^n}\implies a^{-n} \qquad \qquad a^n\implies \cfrac{1}{a^{-n}} \\\\ -------------------------------\\\\ \cfrac{5^4}{25}\implies \cfrac{5^4}{5^2}\implies 5^4\cdot 5^{-2}\implies 5^{4-2}\implies 5^2\implies 25$