A diver descends to a depth of –25.6 feet relative to sea level. How many feet must the diver ascend to reach sea level?

Sea level is 0 feet, and the diver is at –25.6 feet. The distance from –25.6 to 0 is 25.6 feet, so the diver must ascend 25.6 feet.

AI-written and checked against the verified answer.