#### 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

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

$D(20)\approx 1.6$ ft

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.