Question 258295
A valve in a full 6000 gallon water tank is slowly opening. Water flows out of the tank through the valve. The flow rate in gallons per hour is given by the function f(t)=150t^2 where t is in minutes. 
a) How much water flows out of the tank in the first 3 minutes?
b)How many minutes does it take for the tank to empty completely? 
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What class are you in?
Can you use derivatives and integrals?  Are you familiar with those?