Use the position function s(t) = –4.9t* + 250, which gives the height (in meters) of an object that has fallen for t seconds from a height of 250 meters. The velocity at time t= a seconds is given by 4. lim 1(0)$1(!) . !→0 O$! а) Find the velocity of the object when t = 4. b) When will the object hit the ground? c) At what velocity will the object impact the ground?

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