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# Exponential and Logarthmic funtions (1)

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### Exponential and Logarthmic funtions (1)

1. 1. Exponential and Logarithmic Functions Exercise 7.1 A Lecture by Abdul Ghaffar Khan
2. 2. Exercise 7.1
3. 3. Exercise 7.1
4. 4. Exercise 7.1
5. 5. Exercise 7.1
6. 6. Question # 2
7. 7. Question # 45
8. 8. Question # 47 <ul><li>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: </li></ul><ul><ul><li>(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. </li></ul></ul><ul><ul><li>(b) What amount is in the system after 8 hours? After 10 hours? After 24 hours'? </li></ul></ul><ul><li>Answer: </li></ul><ul><li>a) b) After 8h c) After 24h </li></ul>