The amount of doxycyclin (an antibiotic) decays rapidly in the blood. If a patient takes 200 mg of oxycontin, it can be measured that after 5 hours she will have only 50 mg left in her blood. Assuming that the amount of oxycontin in her blood is f(x) = Ab", where x is the number of hours elapsed, (a) find A and b. (b) How much does she have left after 6 hours? (c) What percentage is removed every hour? (d) When will be 30 mg left?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section: Chapter Questions
Problem 18T
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The amount of doxycyclin (an antibiotic) decays rapidly in the
blood.
If a patient takes 200 mg of oxycontin, it can be measured that after 5 hours
she will have only 50 mg left in her blood. Assuming that the amount of
oxycontin in her blood is f(x) = Ab", where x is the number of hours elapsed,
(a) find A and b.
(b) How much does she have left after 6 hours?
(c) What percentage is removed every hour?
(d) When will be 30
mg
left?
Transcribed Image Text:The amount of doxycyclin (an antibiotic) decays rapidly in the blood. If a patient takes 200 mg of oxycontin, it can be measured that after 5 hours she will have only 50 mg left in her blood. Assuming that the amount of oxycontin in her blood is f(x) = Ab", where x is the number of hours elapsed, (a) find A and b. (b) How much does she have left after 6 hours? (c) What percentage is removed every hour? (d) When will be 30 mg left?
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