Question

You're going on a 1211-mile trip, and your car gets about 28 miles per gallon. Gas prices along your route average $3.10. Estimate the cost of gasoline for this trip by rounding the distance to 1200 miles, the mileage to 30 miles per gallon, and the cost of gas to $3.00 per gallon. Calculate the answer without using estimation and compare the two results. (Round your answers to the nearest cent.)


estimated cost $

exact cost . $

Answer 1

Answer:

Estimated cost = $120

Exact cost = $134.075

Step-by-step explanation:

Estimated cost :

Trip distance = 1200

Miles per gallon = 30

Cost per gallon of gas = $3

Cost of gasoline for the trip:

(trip distance / miles per gallon) * cost per gallon of gas

= (1200 / 30) * $3

= 40 * $3

= $120

Exact cost :

Trip distance = 1211

Miles per gallon = 28

Cost per gallon of gas = $3.10

Exact Cost of gasoline for the trip:

(1211 / 28) * $3.10

43.25 * $3.10

= $134.075