Let f(t) = 2400t - 600t2 for0

f(l); 2400t 600t2 for0 t < 2 dietQ;teI Cile position in milesabove theear l} a rocket t hours after liftoff. Assume that the rocket is moving in yertical directiom What is the speed ofthe rocketia5 houk after liftoff? b What is the speed of the rocket L? hoots after liftoff? Yse the definition of the derivative Co find he irst and second derivatives of f@) + 3a; + 1. Find the equaCion of the line tangent to y 4T