# How do you express a^-10 as a positive exponent?

Use this rule of exponents: ${x}^{\textcolor{red}{y}} = \frac{1}{x} ^ \textcolor{red}{- y}$
${a}^{\textcolor{red}{- 10}} \implies \frac{1}{a} ^ \textcolor{red}{- - 10} = \frac{1}{a} ^ 10$