Answer
$0$
Work Step by Step
RECALL:
(i) $\ln{e} = 1$
(ii) $\log_b{1}=0$
(iii) $\log_b{b^x} = x$
Use rule (i) to obtain:
$=\log{1}$
The base of a common logarithm is 10.
With $b=10$, use rule (ii) above to obtain:
$=0$