Answer
$$ 5.33 \ \ years $$
Work Step by Step
The half-life is given by
$$\frac{\ln 2}{k}= \frac{\ln 2}{0.13}=5.33 \ \ years $$
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 7 - Exponential Functions - 7.4 Exponential Growth and Decay - Exercises - Page 349: 11
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