9. The half-life of caffeine in a person's bloodstream is about 6 hours. If a person's...

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9. The half-life of caffeine in a person's bloodstream is about 6 hours. If a person's bloodstream contains 85 milligrams of caffeine, how much of that caffeine will remain after 15 hours? 10. Find the equation of the exponential function f(x). (No Decimals) Answer: Answer: + 3+ 2+ + -1 -+- -2+ -3- ++ -5+ 11. A scientist started with a bacteria culture of 700, which grew to 1000 after 20 minutes. Assuming the count grows exponentially at the same rate, find the doubling time of the bacteria. Answer: 12. You go to the doctor and he gives you 11 milligrams of radioactive dye. After 16 minutes, 7.5 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm if more than 2 milligrams of the dye are in your system, how long will your visit to the doctor take, assuming you were given the dye as soon as you arrived? 13. Find the equation of the exponential function g(x). (No Decimals) Equation: Answer: 3 9. The half-life of caffeine in a person's bloodstream is about 6 hours. If a person's bloodstream contains 85 milligrams of caffeine, how much of that caffeine will remain after 15 hours? 10. Find the equation of the exponential function f(x). (No Decimals) Answer: Answer: + 3+ 2+ + -1 -+- -2+ -3- ++ -5+ 11. A scientist started with a bacteria culture of 700, which grew to 1000 after 20 minutes. Assuming the count grows exponentially at the same rate, find the doubling time of the bacteria. Answer: 12. You go to the doctor and he gives you 11 milligrams of radioactive dye. After 16 minutes, 7.5 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm if more than 2 milligrams of the dye are in your system, how long will your visit to the doctor take, assuming you were given the dye as soon as you arrived? 13. Find the equation of the exponential function g(x). (No Decimals) Equation: Answer: 3