#### Answer

$63.7\ ft$.

#### Work Step by Step

Using the figure as shown in triangle ABC, we have the angle $B=45^\circ$. Using the Law of Cosines, we have
$b^2=90^2+60.5^2-2(90)(60.5)cos(45^\circ)\approx4060$
which gives $b\approx63.7\ ft$.

Published by
Pearson

ISBN 10:
0-13446-914-3

ISBN 13:
978-0-13446-914-0

$63.7\ ft$.

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