A certain drug has a half-life of 2 hours in the bloodstream. The label says to take the drug every six hours. About how much of the drug will be in the bloodstream a month after the patient begins taking 700 mg every six hours?

Answer 1

in three halflives, you should have 1/8 left.

amountremaing=original*(1/2)^3 or

amount remaining= original*e^-.693*6/2