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# An object is propelled vertically upward from the top of a 96-foot building.

An object is propelled vertically upward from the top of a 96-foot building. The quadratic function s(t) = -16t2 + 128t + 96 models the ball's height above the ground, s(t) in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary