Answer
$-2$
Work Step by Step
Apply logarithmic property : $\log a^ b=b \log a$
Re-write as: $\log 0.01=\log \dfrac{1}{100}=\log 10^{-2}$
$\log (10)^{-2}=-2 \log (10)$
Now, take logarithmic to the base $10$ and evaluate the result.
Therefore, our answer is: $\log (10)^{-2}=-2 \log_{10} (10)=-2$