Answer
$c$
Work Step by Step
We start with the expression: $\frac{1}{c^{-1}}$.
We rewrite using the division symbol: $1\div c^{-1}$
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 as $1\div\frac{1}{c^1}$
To divide by a fraction, we rewrite by multiplying by the reciprocal: $1\times c^1$
We multiply: $c$