When planning an airplane route, the trip planner must be careful to consider the range the aircraft can travel and the availability of airports to stop and refuel. A large commercial jet airplane burns approximately 5 gallons of fuel per mile flown, plus 8,500 gallons of fuel per trip reaching cruising altitude. With a useable fuel capacity of 50,000 gallons (there is additional fuel reserved for emergencies), describe the acceptable distance for which an airline could establish a non-stop flight.

For flights originating from Chicago, determine which cities can be safely reached by a non-stop flight. (2 points for writing and solving the inequality for maximum safe distance. 2 points for correctly identifying the )
A layover is when the flight lands at an airport that is not its destination. Then takes off again to reach the original destination.

2) Does a plane use more fuel when there is a layover or during a direct flight assuming the distance traveled does not change? How do you know? (2 points. Answer should clearly state which is more efficient and 1 to 2 sentences on how you know.)