A ball is kicked 4 feet above the ground with an initial vertical velocity of 55 feet per second. The function h (t) = -16t^2+55t+4 represents the height h (in feet) of the ball after t seconds. Using a graph, after how many seconds is the ball 30 feet above the ground? Round your answers to the nearest tenth.
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Home » Mathematics » A ball is kicked 4 feet above the ground with an initial vertical velocity of 55 feet per second. The function h (t) = -16t^2+55t+4 represents the height h (in feet) of the ball after t seconds.