A room 10 ft by 12 ft is to have crown molding installed all the way around the ceiling. The molding costs $0.75 per foot, tax included. What is the total cost for the molding?
step 1
Find the perimeter
P=2(L+W)
substitute given values
P=2(10+12)
P=44 ft
step 2
Find the cost
Applying proportion
0.75/1=x/44
solve for x
x=44*0.75
x=$33
answer is $33