Answer:
9.44 feet).
Explanation:
To find the side length of the wall, we need to divide the total area of the wallpaper used by the number of sides. Since it is a square wall, we can assume that all sides are equal. Therefore, the total area of the wall would be 150.5 ft^2, which we can divide by 4 (for four equal sides). Thus, the side length of the wall would be approximately 9.44 feet (150.5/4 = 37.625, which is the length of one side, and 37.625/4 = 9.40625, which rounds off to 9.44 feet).