The closest measurement for the side length of the wall is: c. 9 ft.
Given the following:
Area of the square wall = [tex]87.5[/tex][tex]ft^{2}[/tex]
Recall:
Area of a square = [tex]s^2[/tex]
where,
[tex]s =[/tex] side length of the square
Therefore, we can determine the side length of the square wall since we know the area of the square wall.
Thus:
[tex]s^2 = 87.5[/tex]
Solve for x
[tex]\sqrt{s^{2} } = \sqrt{87.5}\\s = 9.35[/tex]
Approximately, the closest measurement of the side length of the wall is 9 ft.
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