Answer
$D(3)\approx 27.4$ milligrams.
Work Step by Step
We are given:
$D(t)=50e^{-0.2t}$
To find the amount of the drug left, we plug in $t=3$ hours:
$D(3)=50e^{-0.2*3}\approx 27.4$ milligrams.
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 378: 23
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