Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 6 - Logarithmic Functions - 6.3 Graphing Logarithmic Functions - 6.3 Exercises - Page 512: 62


$\approx -0.654$

Work Step by Step

$= \log_7 (0.28)$ Since the base of the $\log$ function is not $10$, then the change of base formula is required before evaluating by calculator: $= \frac{\log 0.28}{\log 7}$ by GDC / calculator $= -0.65417...$ $\approx -0.654$
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