algebra
posted by alks .
samantha is buying carpet for her bedroom floor, which is a 15footby12foot rectangle. if carpeting cost $1.2 per square fot, how much will it cost samantha to carpet her bedroom?

cost= area*cost/area= 15*12*1.20

huh? i don't get it

Multiply: 15 * 12 * 1.20 = ?

216???
in my books theres A.$68 B.$144 C.$180
D.$225 
Either you've copied the problem wrong or the answer key is wrong.
The area of the carpet is 180 square feet. At $1.20 per square foot, it will cost her $216.