Answer
F) 12 ft
Work Step by Step
Find the area of the room.
$\frac{430\ dollars}{3\frac{dollars}{sq\ ft}}=430\ dollars\times\frac{1}{3}\frac{sq\ ft}{dollar}=430\div3\ sq\ ft=143.\overline3sq\ ft$
The closest perfect square to $143.\overline3$ is 144.
$\sqrt {144}=12$, so the side of the room is about 12 ft.
