Answer
$8$ years old.
Work Step by Step
Evaluate the expression as
$2^{5/2}2^{3/4}\div2^{1/4}=2^{(5/2+3/4-1/4)}=2^3=8$
Thus the answer is: $8$ years old.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.3 - Radicals and Rational Exponents - Exercise Set - Page 48: 141
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