#### Answer

$81=3^4$

#### Work Step by Step

$\ \ 81$
$\swarrow\searrow$
$3\ \ \ \ 27$
$\ \ \ \swarrow\searrow$
$\ \ \ 3\ \ \ \ \ \ \ 9$
$\ \ \ \ \ \ \ \ \swarrow\searrow$
$\ \ \ \ \ \ \ \ 3\ \ \ \ \ \ \ 3$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

$81=3^4$

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