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 17 mph and the Mystic travels at 21 mph. How far apart will they be in 2 hours?
Each boat is travelling for 2 hours. Therefore, we just need to multiply their speed by 2. This will give us the distance they traveled from the start.
