Air in Lungs. If a person breathes in and out every 3
Chapter 7, Problem 111(choose chapter or problem)
Air in Lungs. If a person breathes in and out every 3 seconds, the volume of air in the lungs can be modeled by where A is in liters of air and x is in seconds. How many seconds into the cycle is the volume of air equal to 4 liters?
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