The height of a rocket, launched from the ground, is given by the function y = 30t - 5t2, where y is in meters and t is in seconds. An observer is sitting at ground level a distance d from the launch point. If r is (30t-5t2) (30-10t) the distance between the observer and where the rocket is, show that dr Show all dt (30t-5t2) 2 + d2