Advanced Placement (AP), 28.07.2019 21:00 hannahhoops12
Body cells need a constant supply of oxygen to function normally . humans must maintain a blood oxygen level of 95-100% to allow their body cells to maintain homeostasis. some illnesses can cause a persons blood oxygen level to be lower than the normal range . if a persons blood oxygen level is 92.4% , by what percent must it be raised to reach the low end of normal (95%)?
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