A potato is launched vertically upward with an initial velocity of 123 ft/s from a potato gun at the top of an 85-foot-tall building. The distance in feet that the potato travels from the ground after t seconds is given by s(t) = -81t? + 225t +3. %3D (i) Find the velocity of the potato after 0.5 s = ft/s (ii) Find the speed of the potato at 0.5 s = ft/s S (iii) Determine when the potato reaches its maximum heightD (iv) Find the acceleration of the potato at 0.5 s . ft/s?

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