Martina wants to wallpaper the back wall of her bedroom. The wall is in the shape of a rectangle. Its length is 16 feet, and its width is 8 feet. Suppose wallpaper costs $6 for each square foot. How much will wallpaper cost for the wall?
find the area: length * width
find the cost: $8 times the area
area = 16(8) ft^2 = 128 ft^2
cost = $6(128) or $768
Wow, that is some expensive wall paper.
oh -- was that a 6?
my bad...
To find the cost of the wallpaper for the wall, we need to calculate the area of the wall and then multiply it by the cost per square foot.
The area of a rectangle is found by multiplying its length by its width. In this case, the length of the wall is 16 feet and the width is 8 feet. Therefore, the area of the wall is:
Area = Length * Width
Area = 16 feet * 8 feet
Area = 128 square feet
Now that we know the area of the wall is 128 square feet, we can calculate the cost of the wallpaper. The cost per square foot is given as $6.
Cost = Area * Cost per square foot
Cost = 128 square feet * $6
Cost = $768
Therefore, the wallpaper will cost $768 for the wall.