Answer
0.25 km
Work Step by Step
1. Corresponding sides of familiar triangles are proportional
$\frac{PQ}{BA}=\frac{PC}{AC}$
2. Substitute the values solve for BA:
$\frac{1.25mm}{BA}=\frac{150km}{30km}$
$BA=\frac{1.25\times 30}{150}=0.25km$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 1 - Review Exercises - Page 41: 15
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