Lesson 5: Representing Exponential Decay Cool Down: Acetaminophen Acetaminophen is a common pain reliever and fever reducer. Here is a graph showing the amount of acetaminophen, in milligrams, in an adult's body at different times after they take a normal dose. 1,250 acetaminophen (mg) (0,1000) 1,000 (1,750) 750 (2,562.5) 500 250 2 3 4 . 5 6 8 time (hours) 1. What is the vertical intercept? What does it mean in this situation? 2. What fraction of the medicine remained after one hour? 3. Write an equation that represents the amount of medicine, a, after t hours.