Answer
$720$ feet
Work Step by Step
As we can see, after each minute, his height reduces by $210$ feet; hence after $8$ minutes, his height will be $2400-210\cdot8=2400-1680=720$ feet
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 1, Equations and Inequalities - 1.5 Use Problem Solving Strategies and Models - Guided Practice for Examples 2,3, and 4 - Page 36: 2
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