## College Algebra (10th Edition)

$r\cdot \log_a{M}$
RECALL: For any real numbers $r$, $a\gt 0, a\ne1$, and $B\gt0$, $\log_a{B^r}=r \log_a{B}$ Thus, $\log_a{M^r} = r\cdot \log_a{M}$