If the cost of a movie ticket were doubled it would be more than $15 if siri was the cost in dollars of a movie ticket which mathematical sentence expresses the information above

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