Joshua is planning a 1020-mile driving trip. His car gets an average of 30 mpg, and the cost of gas is about $4.06/gallon. What is the approximate driving cost of the trip

30 miles for a single gallon.

first we find out how many gallons would be used.

number of gallons = 1020/30

gallons = 34.

and since 1 gallon costs $4.06

34 gallons would cost = 34 x 4.06 = $138.04