Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition

Published by Brooks Cole
ISBN 10: 1-43904-957-2
ISBN 13: 978-1-43904-957-0

Chapter 1 - Ingredients of Change: Functions and Limits - 1.2 Activities - Page 20: 10

Answer

$a)$ P is decreasing in the interval $25 \leq t \leq150$ $b)$ The graph has upward concavity in the interval $25 \leq t \leq150$

Work Step by Step

Answer given by direct observation of the graph.
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