Chapter 4 - Section 4.1 - Integer Exponents and Scientific Notation - 4.1 Exercises - Page 278: 123

$\dfrac{p^4}{5}$

Using the laws of exponents, the given expression, $ \dfrac{(p^{-2})^0}{5p^{-4}} ,$ is equivalent to \begin{array}{l}\require{cancel} \dfrac{1}{5p^{-4}} \\\\= \dfrac{1p^4}{5} \\\\= \dfrac{p^4}{5} .\end{array}