Answer
$k=0.0088$
Work Step by Step
$A=A_{0}e^{kt}$
For $A_{0}=44.2, A=62.9, t=40$
$62.9=44.2e^{40k}$
$1.423=e^{40k}$
$\ln 1.423=40k$
$k=0.0088$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 9 - Section 9.6 - Exponential Growth and Decay; Modeling Data - Exercise Set - Page 740: 11
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