Shelby is a certified medical assistant at a local hospital. She is responsible for monitoring the
amount of medicine in a patient's blood every hour. She takes the patient's blood and measures
150 mg of medicine 2 hours after it was administered. Later she measures 60 mg of medicine
14 hours after it was administered. Write an equation that models this situation. How many
hours would it take for the medicine to be completely out of the patient's system?
