The document discusses exponential decay functions related to drug excretion from the bloodstream over time. It provides an example where an initial 300mg dosage of a drug is half excreted from the bloodstream every 4 hours. It asks the reader to determine the exponential function that models the drug amount A over time t measured in 4 hour increments, and uses that function to calculate the remaining drug amounts after specific time periods.

1. Exponential and Logarithmic Functions Exercise 7.1 A Lecture by Abdul Ghaffar Khan

2. Exercise 7.1

3. Exercise 7.1

4. Exercise 7.1

5. Exercise 7.1

6. Question # 2

7. Question # 45

8. Question # 47 Prescription Drug Excretion: For a particular prescription drug, half of the amount of the drug in the bloodstream is excreted by the kidneys every 4 hours. Given an initial dosage of 300 milligrams: (a) Determine the function A = f (t), where A equals the amount of the drug in the bloodstream (in milligrams) and t equals time since the dosage was administered, measured in increments of 4 hours. (b) What amount is in the system after 8 hours? After 10 hours? After 24 hours'? Answer: a) b) After 8h c) After 24h