The diver is currently at 23 feet above sea level. When he descends another 25 feet, he will be at a depth of 23 - 25 = -2 feet.
To reach sea level from -2 feet, the diver needs to ascend 2 feet.
a diver is at an elevation of 23 feet from sea level he descends another 25 feet how many feet does the driver need to ascend to reach sea level
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