15. Circular motion can be described as ___ A. an object rotating upon its axis B. an object moving around the circumference of a circle
C. a circular object in motion D. a spherical object with a constant velocity

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?