Answer
See answer below.
Work Step by Step
From the previous part (a), we have $d= -6.5 \cos (\dfrac{\pi}{6})t+10$
The graph after 3:00 am determines a Horizontal shift 3 units to the left of the $\bf{Graph (a)}$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.5 Write Trigonometric Functions and Models - 14.5 Exercises - Problem Solving - Page 946: 28c
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