A solution A contains 20% by wright of liquid Q, while solution B contains 35% by weight of liquid Q. if 0.2 kg of solution A is mixed with 0.8kg of B, the resulting solution contains what percentage by weight of liquid Q?

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?