An oil tanker breaks apart and starts leaking. As time goes on, the rate at which the oil is leaking out will diminish. Suppose that $t$ hours after the tanker breaks apart, the oil is leaking out at a rate of $R(t) = \frac{0.2}{1 + t^2}$ million gallons per minute. Then million gallons of oil will leak out in the first 6 hours after the shipwreck.