A certain medication decays in the bloodstream according to the function , where is the amount of medication in milligrams remaining in the bloodstream hours after it is administered. Which statement is the best interpretation of in this context?
After 18 hours, approximately 126.56 milligrams of the medication remain in the bloodstream.
After approximately 126.56 hours, 18 milligrams of the medication remain in the bloodstream.
The amount of medication in the bloodstream decreased by approximately 18 milligrams after 126.56 hours.
The amount of medication in the bloodstream decreased by approximately 126.56 milligrams after 18 hours.
