After taking medicine, the human body begins to break it down and remove it according to a pattern of exponential decay. If Samuel takes 500 mg of medication and his body removes 85% of the medication every five hours, which function models the amount of medication in Samuel's boy after & hours?
A. y = 500(0.15)áµ—
B. y = 500(0.684)áµ—
C. y = 85(0.5)áµ—
D. y = 500(1.85)áµ—
