Amedical lab is testing a drug that removes a certain percent of fluid from the lungs of a patient every eight hours. the expression below represents the number of milligrams of fluid remaining in a patient's lungs after n days. which statement best describes the exponent, 3n?
1.)the amount of fluid remaining in the patient's lungs after each day
2.)the initial amount of fluid in the patient's lungs before the drug is introduced
3.)the rate at which the amount of fluid in the patient's lungs is removed by the drug
4.)the number of times the drug has removed a certain percentage of fluid from the patient's lungs