Answer
$10^{-4}$
Work Step by Step
We start with the given expression: $\frac{1}{10000}$
We want to determine what power of $10$ is in the denominator. $10000=10\times10\times10\times10=10^4$
We rewrite the expression as $\frac{1}{10^4}$.
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:
$10^{-4}$
