A ball is thrown upward with an initial velocity of 42 meters per second from a cliff that is 40 meters high. The height of the ball is given by the quadratic equation h = -4.9t2 + 42t + 70 where h is in meters and t is the time in seconds since the ball was thrown. Find the time that the ball will be 30 meters from the ground. Round your answer to the nearest tenth of a second.
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