Answer
See below.
Work Step by Step
The Change-Of-Base Formula states that:
$\log_bx=\dfrac{\log_ax}{\log_ab}$
So, we can use this formula to convert the expression to a logarithm of base 10 or e (which are the only ones included in a calculator):
$\log_3x=\dfrac{\log x}{\log3}=\dfrac{\ln x}{\ln3}$
