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An ocean depth finder shows the number o...

An ocean depth finder shows the number of feet in the depth of water at a certain place. The difference between d, the actual depth of the water, and the depth finder reading , x, is |d-x| and must be less than or equal to 0.05d. If the depth finder reading is 620 feet, what is the maximum value of the actual depth of the water, to the nearest foot?

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