Answer
$log_{10}10000=4$
Work Step by Step
We are given $10^{4}=10000$.
If $b\gt0$ and $b\ne1$, then $y=log_{b}x$ means $x=b^{y}$ for every $x$ and every real number $y$.
Therefore, $10^{4}=10000$ is equivalent to $log_{10}10000=4$.
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