Answer:
$1782
Step-by-step explanation:
The cost of the carpet is the product of the number of square feet in the area of the floor, and the cost for each square foot.
The area of a rectangle is given by ...
A = LW
For Kaitlin's living room, the area is ...
A = (18 ft)(11 ft) = 198 ft²
Each of those 198 square feet costs $9 to carpet, so the total cost is ...
carpet cost = ($9/ft²)×(198 ft²) = $1782
It will cost $1782 for the carpet for the living room floor.
