1. A large tank of canola oil ruptures at a timet = 0 minutes, and the oil leaks out at a rate of r(t) = 100e^-0.01(t) liters per minute. How much oil leaks out within the first hour?

I am assuming that you would set u = 100, and dv = e^-0.01(t), so then du = 0 and v = e^t/(-0.01)...right? But I have no idea how to go from there..someone please help?