Question: A ball is projected upward from the ground. Its height h, above ground, in feet, can be determined by the equation h=16t2+128t, where t is

A ball is projected upward from the ground. Its height h, above ground, in feet, can be determined by the equation h=16t2+128t, where t is the number of seconds after the ball is projected. After how many seconds will the ball be 256 ft above ground?

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