# Chapter 12 - Exponential Functions and Logarithmic Functions - 12.3 Logarithmic Functions - 12.3 Exercise Set: 77

$\log_{e}20.0855=3$

#### Work Step by Step

Since $b^y=x$ is equivalent to $y=\log_bx,$ the given equation, $e^3=20.0855 ,$ is equivalent to \begin{array}{l}\require{cancel} \log_{e}20.0855=3 .\end{array} Note that $\log_ex$ is often abreviated $ln(x)$.

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