The directions for mixing an insect spray say to use 2 3/4 ounces of chemical in each gallon of water. how many ounces of chemical should be mixed with 7 4/5 gallons of water?

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?