It is common for people to take a dosage of acetaminophen, a pain medication, once per day. The medicine works best when there is a specific amount in the bloodstream. A doctor found that the amount of acetaminophen (in mg) remaining in the bloodstream x hours after taking a 1000 milligram dosage can be modeled by the equation:
predicted amount of acetaminophen in the blood stream = 1000(.76)^hours since taken
The number .76 in this model indicates that the amount of acetaminophen in the blood stream:
decreases at a rate of 1000% per hour.
decreases at a rate of 76% per hour.
increases at a rate of 24% per hour.
decreases at a rate of 24% per hour.