A ball is dropped from the top of a tower 80 ft high

a ball is dropped from the top of the tower 80 ft.high at the same instant that a second ball is thrown upward from the ground with an initial velocity of 40 ft/s.a.)When do they pass each other and b.)where do the pass each other.

1. a.) using the free fall height equation ... -16 t^2 + 80 = -16 t^2 + 40 t

   b.) plug the t from a.) into either expression ... -16 t^2 + 80 or -16 t^2 + 40 t

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