The volume V, in liters, of air in the lungs during a four-second respiratory cycle is approximated by the model
V = 0.1729t + 0.1522t2 − 0.0374t3,
where t is the time in seconds. Approximate the average volume of air in the lungs during one cycle. (Round your answer to four decimal places.)

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calculate the area by integration and divide by 4
|dw:1443087401475:dw|

which will give you a time weighted average
|dw:1443087484413:dw|

So the answer would be 2?

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