Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 5 - Logarithmic Functions - Strengthen Your Understanding - Page 228: 26



Work Step by Step

After $5$ hours, the total will be halved, so the value is $\frac{1}{2}$. After 10 hours, another half will be depleted, so $\frac{1}{2}\cdot \frac{1}{2}=\frac{1}{4}$. Thus, $\frac{1}{4}$ of the substance will remain after $10$ hours, not $25$ hours.
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