A new car is purchased for $38,000 and over time its value depreciates by one half every 4.5 years. How long, to the nearest tenth of a year, would it take for the value of the car to be $10,900?

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters