Answer
.51 km
Work Step by Step
$D(h)= 111.7\sqrt h$
$80= 111.7\sqrt h$
$80/111.7=111.7\sqrt h/111.7$
$.716204=\sqrt h$
$.716204^2=(\sqrt h)^2$
$.5129=h$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.6 - Radical Equations and Problem Solving - Exercise Set - Page 732: 79
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