Answer
$1.796$
Work Step by Step
Change of Base Formula: $\hspace{20pt} \log_ a M = \dfrac{\log_b M}{\log_b a}$
$\log_5 18 = \dfrac{\log_{10} 18}{\log_{10} 5}$
Where: $a=5 \hspace{10pt} M = 18 \hspace{10pt} b = 10$
$ \dfrac{\log_{10} 18}{\log_{10} 5} \approx \boxed{1.796}$
