Aquaman is helping clean up an oil spill. He fills a tank with the pollutants; the result is a tank filled to a depth of 56.7 cm with seawater on top of which floats a 29.6 cm thick layer of crude oil. Assuming that the density of the seawater is 1.020 g/cm and the density of the crude oil is 0.925 g/cm, what will be the gauge pressure (in kPa) at the bottom of the tank?
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