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You Are on an Airplane at an Altitude of 20,000

Question 88

Multiple Choice

You are on an airplane at an altitude of 20,000 feet where atmospheric pressure is 350 mm Hg. Air is pumped into the cabin for you to breath. What would the percent of oxygen in this are need to be to allow you to breath air with a partial pressure of oxygen of around the normal 150 mm Hg?


A) 10%
B) 20%
C) 40%
D) 100%
E) 150%

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