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A hot air balloon is rising straight up at a constant speed of 6.20 m/s. When...

A hot air balloon is rising straight up at a constant speed of 6.20 m/s. When the balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 28.9 m/s. Along the paths of the balloon and the pellet, there are two places where each of them has the same altitude at the same time. How far above the ground are these places? Enter the smaller altitude first.

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