What Is The Cost In Dollars To Steam Clean A Room W Yards Wide And L Yards Long If The Steam Cleaners Charge 10 Cents Per Square Foot?

A. 0.9WL

Here is the solution:
3 feet = 1 yard
so width = 3W
length = 3L
Area = 9WL
cost in dollars = 9WL/10
0.9WL is the correct answer

0.9wl