Intermediate Algebra (12th Edition)

We know that logarithms with base $e$ are natural logarithms, and $ln(x)$ can be written as $log_{e}x$. Therefore, $ln(8.32)=log_{e}8.32$. 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, $log_{e}8.32\approx2.1187$, because $e^{2.1187}\approx8.32$.