Step by step would also be greatly appreciated

This is different from the first one can someone me

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?

The tree filled 3/4 of a cup in 1/2 and hour at what rate does syurup flow from the tree