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A stone is thrown downward into an abandoned mine shaft with a velocity of 12 fps....

A stone is thrown downward into an abandoned mine shaft with a velocity of 12 fps. 4 seconds later, the sound of the stone was heard. If sound travels 1120 fps, air resistance of the stone neglected, and the acceleration of gravity is 32.2 fps^2. Determine the distance from the top of the mine shaft to the water surface in the shaft.

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