48 hours = 2 days
What is Ro?
to determine whether a person has as thyroid deficiency, a radioactive iodine with a half-life of 8.2 days is injected into the bloodstream. a healthy thyroid is able to absorb all of the radioactivity. the amount, R, of radioactivity present after t days can be modeled by the relationship R(t) = Ro (1/2)^t/8.2, where Ro is the initial dose. how much iodine has been absorbed into a health person's body after 48 hours?
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