The side length of the wall is C. 9 ft.
Step-by-step explanation:
Step 1:
The area of the square wall Paula covered with wallpaper was 87.5 ft².
The area of a square is determined by squaring the side length.
Here we know the area of the square and need to determine the side length of the wall.
The area of a square [tex]= a^{2},[/tex] where a is the side length.
Step 2:
The area of the wall = [tex]87.5,[/tex]
By substituting the known values, we get
[tex]a^{2} = 87.5, a = \sqrt{87.5} = 9.354[/tex] ft.
So the side length of the wall is C. 9 ft.
