Question

kaitlin 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?

Explanation:

Step1: Calculate the area of the wall

The area $A$ of a rectangle is $A = l\times w$, where $l = 16$ feet and $w = 8$ feet. So $A=16\times8 = 128$ square - feet.

Step2: Calculate the total cost

The cost per square - foot is $6$ dollars. So the total cost $C$ is $C=6\times A$. Substitute $A = 128$ into the formula, we get $C = 6\times128=768$ dollars.

Answer:

$768$ dollars