The half-life of a medication is the amount of time for half of the drug to be eliminated from the body. The half-life of Advil or ibuprofen is represented by the equation R = M(0.5) where R is the amount of Advil remaining in the body, Mis the initial dosage, and t is time in hours. A 200 milligram dosage of Advil is taken at 1:00 pm. How many milligrams of the medication will remain in the body at 5:00 pm?