Answer
$c = e^{17}$
Work Step by Step
$Write$ $the$ $equation$ $in$ $exponential$ $form:$
$\ln c = 17 $
Natural log form to exponential form: $\ln a = b \rightarrow e^b = a$
Plug in c for a and 17 for b
$$\ln c = 17 \rightarrow e^{17} = c$$
$$c = e^{17}$$