Maxim/Minimum Extrema derivatives
One model of worldwide oil production is the function given by the following formula where P(t) is the # of barrels in billions produced in a year, t years after 1933. According to this model, in what yaer did worldwide oil production achieve an absolute maximum? What was that maximum?

P(t)=0.0000000218t^4-0.0000167t^3 0.00156t^2 0.002t 0.22 0 (theyre greater than or equal too)