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1) An object dropped from a tower has its height in feet above the ground t seconds into the fall given by s(t)=160-16t2. Include

1) An object dropped from a tower has its height in feet above the ground t seconds into the fall given by s(t)=160-16t2. Include appropriate units in your answers to all questions: a) What is the object's velocity, speed, and acceleration at time t? b) How long does it take the object to hit the ground? c) What is the object's velocity at the moment of impact?

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