boyd drives a car for 4.7 hours and goes 326 miles. he uses 10.6 gallons of gas. priced at $3.52 per gallon. what is his average speed, his miles per gallon and how much did it cost him?

average speed = 326 / 4.7 = 69.36 miles/hr

miles per gallon = 326 / 10.6 = 30.75 

total cost = 3.52 * 10.6 = 37.312 $