Thank you for the opportunity to help you with your question!
during a regular respiratory cycle, the volume of air in liters in the human lungs can be described by the function:
0.173t+0.152t^2-0.035t^3=V(t) where t is time in seconds.
about how long does a regular respiratory cycle last?
Please let me know if you need any clarification. I'm always happy to answer your questions.