Answer
$D(20)\approx 1.6$ ft
Work Step by Step
We are given:
$D(t)=\frac{5.4}{1+2.9e^{-0.01t}}$
We plug in $t=20$ years:
$D(20)=\frac{5.4}{1+2.9e^{-0.01*20}}\approx 1.6$ ft
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 4.2 - The Natural Exponential Function - 4.2 Exercises - Page 379: 30
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