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Mathematics
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OpenStudy (anonymous):
problem: After exercising for a few minutes, a person has a respiratory cycle for which the velocity, v (in liters per second), of air flow is approximated by: v=1.75sin(PI/2)(t); where t is time in seconds. Inhalation occurs when v>0 and exhalation occurs when v<0
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OpenStudy (shadowfiend):
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