The number of gallons of water remaining in a swimming pool t minutes after the drains are opened and the pool begins emptying is give given by the function f(x)=40t^2-3000t+40,000gallons. Exactly 2 minutes after the drains are opened, the pool was emptying at an instantaneous rate of _____ gallons per minute. Find the instantaneous rate of change at t =2.
0 answers