Question

kaitlin wants to wallpaper the back wall of her bedroom. the wall is in the shape of a rectangle. its length is 10 feet and its width is width value missing. suppose wallpaper costs $6 for each square foot. how much will wallpaper cost for the wall?

Explanation:

Step1: Calculate the area of the rectangular wall

The area formula for a rectangle is $A = l\times w$, where $l = 10$ feet and $w = 8$ feet. So $A=10\times8 = 80$ square - feet.

Step2: Calculate the total cost of the wallpaper

The cost per square - foot is $6$. Multiply the area by the cost per square - foot. So the total cost $C=6\times A$. Substitute $A = 80$ into the formula, we get $C = 6\times80=480$.

Answer:

$480$