Justin began walking around the park every morning. When he started, he was walking a tota of 400 yards each time. Last week he started walking a total of 560 yards instead. By what
Dercentage did Justin increase the distance he walks?

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?