Answer
$\dfrac{1}{64}$
Work Step by Step
Using $a^{-n}=\dfrac{1}{a^n}$, the given expression, $
8^{-2}
$, simplifies to
\begin{array}{l}\require{cancel}
\dfrac{1}{8^{2}}
\\\\=
\dfrac{1}{64}
\end{array}
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