College Algebra 7th Edition

Published by Brooks Cole

Chapter P, Prerequisites - Section P.9 - Modeling with Equations - P.9 Exercises: 41

Answer

y=$4\sqrt 5$ feet.

Work Step by Step

The equation for the area of this figure is $(\frac{y\times y}{2})+(y\times y) = 120$. Solving for $y$ yields $y=\sqrt {(\frac{2}{3}) \times 120}=\sqrt {80}=4\sqrt 5$ feet.

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