Sadie has a cousin nanette in germany. both families recently bought new cars and the two girls are comparing how fuel efficient the two cars are. sadie tells nanette that her family’s car is getting 42 miles per gallon. nanette has no idea how that compares to her family’s car because in germany mileage is measured differently. she tells sadie that her family’s car uses 6 liters per 100 km. which car is more fuel efficient? explain everything