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So we just want to find the area of the wall, correct? And the wall appears to be a rectangle, since one one side (wide) is 15 ft and another side (high) is 8 ft.

Area of rectangle = length * width (in our case, wide * high)

Area = 8 * 15 = 120 square ft (the square just indicates area)

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Q: What formula do you use for this problem - how many square feet of wallpaper are needed to cover a wall 8 ft high by 15 ft wide?
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