Answer
$\log_{c}{r}+\log_{c}{s}+\log_{c}{t}$
Work Step by Step
Using $\log_b(xy)=\log_b x +\log_b y,$ the given logarithmic equation, $
\log_{c}{(rst)}
,$ is equivalent to
\begin{array}{l}\require{cancel}
\log_{c}{r}+\log_{c}{s}+\log_{c}{t}
.\end{array}
