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HugoPang1
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Homework Statement
When iodine is ingested by humans they eliminate it such that on half of the body's iodine content is execreted every 4.0 days. Radioactive 131I with a physical half-life of 8.1 days is administered to a patient. When will only 1% of the isotope remain in the patient's body?
Homework Equations
1/T1/2, e = 1/T1/2,p + 1/T1/2,b
The Attempt at a Solution
I got the rest of the equation but I don't know how people got T1/2,e = 2.7 d
Help please!