Answer
$2601.71$ years.
Work Step by Step
Plugging in $D=0.73D_0$ into the formula, we get:
$A=-8267\ln(\frac{0.73D_0}{D_0})=-8267\ln(0.73)\approx2601.71$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 4, Exponential and Logarithmic Functions - Section 4.3 - Logarithmic Functions - 4.3 Exercises - Page 389: 97
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