A ball is dropped from a height of 121.3 meters. Its height above ground (in meters) t seconds later is given by s(t) = -16.5t2 + 121.3 What is the instantaneous velocity of the ball when it strikes the ground? O a. 44.74 O b.-89.48 O c. -44.74 O d. 89.48 Oe. None of these choices are correct. O f. -4002.90

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