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In a building the ventilation system operates when the concentration of carbon dioxide reaches a certain level.Suppose that when the ventilation system operates,the cubic feet of carbon dioxide,X,in an 8000 cu ft room depends on time t (in minutes) according to x=4.8+11.2(e^(-t/4))
a).Find the initial amount of carbon dioxide in the room,and find the concentration of carbon dioxide at this time.
b).How long does it take to have a concentration of 0.07% carbon dioxide?
c).The steady-state or equilibrium concentration is what would result if the ventilation system were left on indefinitely. By using large values for t ,determine the steady-state concentration.
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