Question: A patient going into surgery has been injected with 250 milligrams of Atvian, a drug commonly given to ease anxiety. The amount of the drug in the body decreases at a constant rate of 33% per hour. 1. Create a function that models the number of milligrams of Atvian in the patient's system "t" hours after being injected with the drug.
2. It is expected for the surgery to last an hour and a half. How much Atvian is remaining in the body after surgery is completed? Round to the nearest tenth of a milligram.
3. The patient is allowed to receive pain medication when only 50 milligrams, or less of Ativian remains in the body. How many hours after surgery can the patient receive their pain medication? Round to the nearest hour.

Solutions to this would be greatly appreciated.