Youre going on a 1211mile trip and your car gets about 28 mi

You\'re going on a 1211-mile trip, and your car gets about 28 miles per gallon. Gas prices along your route average $3.40. 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____ $

Solution

without using estimation:
total cost = cost *number of mile / mileage
= 3.40*1211/28
=$147.05

with estimation:
total cost = cost *number of mile / mileage
= 3.00*1200/30
=$120.00

Answer:
estimated cost = $120.00
exact cost = $147.05