#### Answer

$11$

#### Work Step by Step

RECALL:
$a^{\frac{1}{2}}=\sqrt{a}$
Use the definition above to obtain:
$=\sqrt{121}
\\=\sqrt{11^2}
\\=11$

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

$11$

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