You are transporting a patient who is receiving 100% oxygen via nonrebreathing mask at 15 L/min. Your onboard oxygen, an M cylinder, contains 2,000 psi. How long can you administer oxygen to the patient at this flow rate?
A. 3.1 hours
B. 3.8 hours
C. 4.0 hours
D. 4.4 hours
Answer: A. 3.1 hours
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