Use signed numbers to solve each problem.SUNKEN SHIPS Refer to the map below.a. The German...

Use signed numbers to solve each problem.

SUNKEN SHIPS Refer to the map below.

a. The German battleship Bismarck, one of the most feared warships of World War II, was sunk by the British in 1941. It lies on the ocean floor 15,720 feet below sea level off the west coast of France. Represent that depth using a signed number.

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b. In 1912, the luxury liner Titanic sank after striking an iceberg. It lies on the North Atlantic ocean floor, 3,220 feet higher than the Bismarck. At what depth is the Titanic resting?