Posted by Bob on .
Mr. Rainier's car uses about 1.6 fluid ounces of gas per minute when the engine is idling. One night, he parked his car but forgot to turn off the motor. He had just filled his tank. His tank holds 12 gallons.
About how many hours will it take before his car runs out of gas?

Math 
PsyDAG,
1 gallon = 128 fluid ounces
1 hour = 60 minutes
Let x = time in hours.
(1.6)(60)x = 12(128)
Solve for x.