Answer
$P=25 I^2$.
Work Step by Step
The given formula is
$I=\frac{1}{5}\sqrt{P}$
Multiply both sides by $5$.
$5\times I=5\times\frac{1}{5}\sqrt{P}$
Simplify.
$5 I=\sqrt{P}$
Square both sides.
$(5 I)^2=(\sqrt{P})^2$
Simplify.
$25 I^2=P$.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 10 - Radical Expressions and Equations - Common Core Cumulative Standards Review - Selected Response - Page 660: 26
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