## Intermediate Algebra for College Students (7th Edition)

$0$
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: $=0$