Answer
$4$.
Work Step by Step
The degree of a function of variables is the highest power of the function, hence here the second has the maximum with $2+2=4$.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 6 - Section 6.8 - Modeling Using Variation - Exercise Set - Page 491: 62
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