Introduction to Limits
A patient receives the same dose of medication at regular time intervals. The graph shows the quantity Q(t) of the drug in the bloodstream, in mg, as a function of time, t, in hours. Complete parts a through d below.
At the precise instant the fourth dose is taken, the level of drug in the bloodstream is mg.
As time gets closer to the patient's fourth dose of medication after it is taken, the drug level in the patient's bloodstream approaches mg.