Town A currently has 10,000 people and the population is growing by 1,000 people per year. Town B currently has 9,000 people and the population is growing by 10% per year. After how many years will Town B first have more people than Town A?

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?