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A submarine carries an oxygen tank that holds oxygen at a pressure of 100 atm. What...

A submarine carries an oxygen tank that holds oxygen at a pressure of 100 atm. What must be the volume of the tank to provide adequate oxygen for 50 people for 10 days? Assume that daily energy expenditure is 2320 cal/m^2 and the average surface area of each person is 1.70 m^2. the answer is 4.05 m^3 but i do not understand.

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