# Chapter 4 - Review - Exercises: 28

$k = \ln m$

#### Work Step by Step

$Write$ $the$ $equation$ $in$ $logarithmic$ $form:$ $e^k = m$ Exponential form to natural log form: $e^b = a \rightarrow \ln a = b$ [e stands for euler's number] Plug in $k$ for b and $m$ for a $$e^k = m \rightarrow \ln m = k$$ $$k = \ln m$$

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