Question

In a regular respiratory cycle, the volume of air in liters in human lungs can be described by V(x) = 0.173x + 0.152x^2 - 0.035x^3, where x is the time in seconds.

i) About how long does a regular respiratory cycle last?
ii) Estimate the time in seconds from the beginning of this respiratory cycle for the lungs to fill to their maximum volume of air.

What formula do you use for this?

Answer 1

Answer:

I think 2 is wright answer bro