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A) If h(t) = -16t2 + 64t + 100, t in seconds, describes a stone falling...

A) If h(t) = -16t2 + 64t + 100, t in seconds, describes a stone falling from the roof of a 100-foot-tall building, its average speed in the first 2 seconds is?

B) The moment in which the instantaneous speed coincides with the average speed of the stone of the previous problem is?

C) Find the maximum and the absolute minimum of f (x) = x-2ln x in [1/2, 4]

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