## Algebra 1

$\frac{q^4}{p^2}$
We write the expression given as a division problem: $1\div p^2q^{-4}r^0$ The negative exponent rule states that for every nonzero number $a$ and integer $n$, $a^{-n}=\frac{1}{a^n}$. We use this rule to rewrite the expression: $\frac{1}{1}\div\frac{p^2r^0}{q^4}$ To divide fractions, we multiply by the reciprocal: $\frac{1}{1}\div\frac{q^4}{p^2r^0}$ We multiply the numerators and the denominators: $\frac{q^4}{p^2r^0}$ The zero as an exponent rule states that for every nonzero number $a$, $a^0=1$. We use this to rewrite the expression as: $\frac{q^4}{p^2\times1}=\frac{q^4}{p^2}$