Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 8 - 8.4 - Vectors and Dot Products - 8.4 Exercises - Page 595: 26



Work Step by Step

$||u||=\sqrt {uā‹…u}=\sqrt {(12i-16j)(12i-16j)}=\sqrt {12^2+(-16)^2}=\sqrt {144+256}=\sqrt {400}=20$
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