A boat was heading up the river with a velocity of 45 km/h, N. The river was flowing down into the boat with a velocity of 10 km/h, S. What is the resultant vector of the boat?

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?