Question
Express the following as a rational number:
$5^{-3}$
$5^{-3}$
✓
Answer
$5^{-3}=\Big(\frac{1}{5}\Big)^{3}$
$=\frac{1}{5}\times\frac{1}{5}\times\frac{1}{5}$
$=\frac{1}{125}$
$=\frac{1}{5}\times\frac{1}{5}\times\frac{1}{5}$
$=\frac{1}{125}$
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