# Chapter 6 - Logarithmic Functions - 6.3 Graphing Logarithmic Functions - 6.3 Exercises - Page 512: 60

$\approx - 5.586$

#### Work Step by Step

$= \log_{0.4} (167)$ Since the base of the $\log$ function is not $10$, then the change of base formula is required before evaluating by calculator: $= \frac{\log 167}{\log 0.4}$ by GDC / calculator $= -5.5855...$ $\approx - 5.586$

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