Answer
$$\frac{1}{6}e^{0.65r}$$
Work Step by Step
Simplifying the expression using the rules of exponents:
$$\frac{\left(e^{0.4r}\right)^2}{6e^{0.15r}} \\ \frac{e^{0.65r}}{6} \\ \frac{1}{6}e^{0.65r}$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 4 - Exponential Functions - 4.5 The Number e - Exercises and Problems for Section 4.5 - Skill Refresher - Page 172: S15
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