Answer
60%
Work Step by Step
$ 5-1-1 = 3$ (distance of trail more than one mile from either road)
$3 * .2 = .6 (60 $percent$)$ (distance of trail * height under curve)
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 3 - The Normal Distributions - Apply Your Knowledge - Page 78: 3.2d
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