Following surgery a patient has been receiving a pain relief medication intravenously The concentration C in milligrams per liter of the medication in the patient s bloodstream t hours after this process started is given by C t 50t 10 5 a The patient will not receive pain relief unless the concentration of the medication is 15 or more milligrams per liter Use this function to determine the time interval for which the concentration of the medication C will be greater than or equal to 15 milligrams per liter The time interval for which the patient will receive pain relief is Express your answer in interval notation and round any decimals to the nearest tenth of an hour hours b If the intravenous medication continues to be given to the patient that is as time goes on and t approaches oo the concentration will approach milligrams per liter Question Help