drug is administered to a patient by injection. The concentration C(t) of the drug in the patient's bloodstream t minutes after injection is given by C(t) = some unknown function, where C is measured in milligrams per lite (mg/L). (a) What are the units of C(t)? (b) It turns out that C(3) = 1.45. Give a biological interpretation of the meaning of this expression in this context. 1