A doctor prescribes a 400-mg antibiotic tablet to be taken every eight hours. Just before each tablet is taken, 20% of the drug present in the preceding time step remains in the body.
(a) How much of the drug is in the body just after the second tablet is taken? After the third tablet? second tablet mg third tablet mg (b) if Qn, is the quantity of the antibiestic in the body just after the oth tablet is taken, find an equation that expresses Qn +1 in terms of Qn
Qn + 1 =
(c) What quantity of the antibiotic remains in the body in the long run? mg