Answer
$\vert ~R ~\vert = \sqrt{5}$
$\sqrt{5}$ inches of rain falls
Work Step by Step
$R = i-2j$
We can find the magnitude of R:
$\vert ~R ~\vert = \sqrt{(1)^2+(-2)^2}$
$\vert ~R ~\vert = \sqrt{5}$
$\sqrt{5}$ inches of rain falls
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 7 - Applications of Trigonometry and Vectors - Section 7.5 Applications of Vectors - 7.5 Exercises - Page 338: 31a
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