Example 2: A volleyball is served into the air at 30 ft/sec from a height of 4 ft. The quadratic equation h = -16t² + 30t + 4 models the height in feet over time in seconds. How long until the ball hits the floor?
A diagram showing a quadratic equation representing the height of a volleyball over time, with a parabolic graph and the equation h = -16t² + 30t + 4.
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