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an object that is projected straight downward with an initial velocity of v per second travels a distance s = vt + 9t^2, where t=time in seconds. if dan is standing on a balcony 176 feet above the ground and throws a penny straight downward with an intial velocity of 8 feet per second, in how many seconds will it reach the ground?
When the object reaches the ground it will have traveled 176 feet
solve by following quadratic formula
a=9, b=8, c=-176
The object wll reach the ground in 4 seconds.