The energy efficiency of electric vehicles is usually rated in terms of the kilowatt-hours (of energy) required to drive 100
miles, or kWh/100 mi. An electric car is rated at 40 kWh/100 mi.
a. Is a vehicle rated 39 kWh/100 mi more or less efficient than this electric car?
b. How much energy (in kilowatt-hours) is required to drive this electric car 290 miles?
c. Assuming electricity costs $0.16/kWh, how much does it cost to drive this electric car 350 miles?