Answer
(a) $\frac{\log16}{\log5}$
(a) $\frac{\ln16}{\ln5}$
Work Step by Step
Just apply the Change-of-Base Formula: $\log_ax=\frac{\log x}{\log a}~or~\log_ax=\frac{\ln x}{\ln a}$.
(a) $\log_516=\frac{\log16}{\log5}$
(a) $\log_516=\frac{\ln16}{\ln5}$
