Answer
See below.
Work Step by Step
Using a graphing calculator, see the attached graph.
If $d=8$, then $8=1.22\sqrt a\\\sqrt{a}=6.557\\a=6.557^2=43$
Thus the altitude is $43$ 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 6 Rational Exponents and Radical Functions - 6.5 Graph Square Root and Cube Root Functions - 6.5 Exercises - Problem Solving - Page 450: 35
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