If a ball is thrown upward at 19.6 meters per second from the top of a building that is 30 meters high, the height of the ball can be modeled by S = 30 + 19.6t - 4.9t^2, where t is the number of seconds after the ball is thrown. Answer parts a through c. a. Find the t-coordinate and S-coordinate of the vertex of the graph of this quadratic function. The t-coordinate of the vertex of the graph of this quadratic function is t = (Simplify your answer.)
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