Answer
$81a^{14}\ mi^2$
Work Step by Step
$area=side^2$
$a=(9a^7)^2=9^2a^{7\times2}=81a^{14}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 10 - Review - Page 727: 23
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