Question 1062728
.
When seated, and average adult breathes in and out every 4 seconds. The average minimum amount of air in the lungs is 80ml, 
and average maximum amount of air in the lungs is 800ml

a. Assuming that the lungs are at a minimum at t= 0, sketch the graph that represents the average amount of air 
   in the lungs over time for at least 2 cycles

b. Determine the amplitude and vertical displacement, period and k value

c. Determine a possible value for the phase shift and justify your choice

d. Determine an equation that will model the given situation 
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d.  V(T) = 440 - 360*cos((2pi*t)/4)


a.  Plot:


{{{graph( 330, 330, -1.5, 8.5, -100.5, 900.5,
          440 - 360*cos((6.28*x)/4)
)}}}


Plot  V(T) = 440 - 360*cos((2pi*t)/4)



b.  Amplitude = {{{(800-80)/2}}} = 360 mL


    Average value = {{{(800+80)/2}}} = 440 mL


    Period = 4 seconds.
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