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Grade 11 Exponents CCSS: HSF-LE.A.4
A patient is administered a 750 mg dose of a therapeutic drug. The amount of the drug remaining in the patient's bloodstream is modeled by the function [math]A(t)=A_0⋅e^(−rt)[/math], where t is time in hours. After 3 hours, 500 mg of the drug remains. To be effective, a second dose must be given when the drug level falls to 20% of the original dose. When should the second dose be administered?
- 10.8 hours
- 14.2 hours
- 12.5 hours
- 15.7 hours
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