How do I do this I need help

How far could you drive on 50 gallons of gas

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?