Answer: the cost of the wallpaper per square feet is $0.6
Step-by-step explanation:
The formula for determining the area of one rectangle of the rectangular room is expressed as
Area = Length × width
Wallpaper was applied to one rectangle of a small room. 8.5 ft by 9 ft. It means that the area on which the wallpaper is applied is
9 × 8.5 = 76.5 square feet
If the total cost of wallpaper was $45.90, it means that the cost of the wallpaper per square feet is
45.9/76.5 = $0.6