Answer
$x \approx 10.514$
Work Step by Step
$3(1.6)^{x} - 20 = 400$
$3(1.6)^{x} = 400 + 20$
$3(1.6)^{x} = 420$
$(1.6)^{x} = 140$
$x = \log_{1.6} (140)$
$x = \frac{\log 140}{\log 1.6}$
$x = 10.5140...$
$x \approx 10.514$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 6 - Logarithmic Functions - 6.5 Solving Exponential Equations - 6.5 Exercises - Page 528: 73
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
