Answer
3
Work Step by Step
A common logarithm is a logarithm to base 10. As shown on page 580, when a common logarithm is written in the form $log (x)$, this is equivalent to the expression $log_{10}x$.
Therefore, $log 10^{3}=log_{10}10^{3}=3$. We know this, because $(10)^{3}=10^{3}$.
