#### Answer

-3.8304

#### Work Step by Step

We know that logarithms with base $e$ are natural logarithms, and $ln(x)$ can be written as $log_{e}x$.
Therefore, $ln(0.0217)=log_{e}0.0217$.
We know that for all positive numbers $a$ (where $a\ne1$), and all positive numbers $x$, $y=log_{a}x$ means the same as $x=a^{y}$.
Therefore, $log_{e}0.0217\approx-3.8304$, because $e^{-3.8304}\approx0.0217$.