Titanic Question in Chemistry!?

The motion picture Titanic described the tragedy of the collision of the ocean liner of the same name with an iceberg in the North Atlantic. The ship sank soon after the collision on April 14, 1912, and now rests on the sea floor at a depth of 12150 ft. Recently, the wreck was explored by the research vessel Nautile, which has successfully recovered a variety of items from the debris field surrounding the sunken ship. The pressure exerted on the hull of the Nautile as it explores the seabed surrounding the Titanic is ____ pounds per square inch. (Hint: The height of a column of liquid required to exert a given pressure is inversely proportional to the liquid’s density. Seawater has a density of approximately 1.025 g mL-1; mercury has a density of 13.6 g mL-1; 1 atm 14.7 lb in-2.)

This makes absolutely no sense! And neither my professor or my book are of value.

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