Your family is going to visit a relative who lives 389.2 mi from your home. The family car gets 29.6 miles per gallon of gasoline. If the price of a gallon of gas is 2.16, about how much will the gasoline for the trip cost?

number of gallons used = 389.2/29.6 gallons = ....

you know the cost per gallon of gas, so .....

(estimated cost = appr 390/30 * 2 = 39/3*2 = 13*2 = 26
this can be done mentally)

To calculate the cost of gasoline for the trip, you need to divide the total distance (389.2 miles) by the car's fuel efficiency (29.6 miles per gallon). This will give you the number of gallons needed for the trip. Next, you multiply the number of gallons by the price of one gallon of gasoline ($2.16) to find out the total cost.

Here's how you can calculate it step by step:

Step 1: Divide the total distance by the car's fuel efficiency.
389.2 miles / 29.6 miles per gallon = 13.162162 gallons

Step 2: Multiply the number of gallons by the price of one gallon.
13.162162 gallons x $2.16 per gallon = $28.41 (rounded to the nearest cent)

Therefore, the gasoline for the trip will cost approximately $28.41.