Answer
Step 1. See figure.
Step 2. $5 $
Work Step by Step
Step 1. Given $\vec v=-3i-4j$, we can sketch the vector as shown in the figure.
Step 2. We can find the magnitude of the vector as $|\vec v|=\sqrt {(-3)^2+(-4)^2}=5 $
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 6 - Section 6.7 - The Dot Product - Exercise Set - Page 799: 82
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