Answer
$10 \sqrt 2$;
Out of page.
Work Step by Step
$|u \times v|=|u||v|sin \theta$
$=(4) (5) sin 45^ \circ$
$=20 (\frac{1}{\sqrt 2})$
$=10 \sqrt 2$
Vector $ u \times v$ must point out of page.
Calculus: Early Transcendentals 8th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1285741552
ISBN 13:
978-1-28574-155-0
Chapter 12 - Section 12.4 - The Cross Product - 12.4 Exercises - Page 821: 14
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