Roughly 12 000 people in a certain country are diagnosed with thyroid cancer every year which accounts for 1 of all cancer cases

Question

Roughly 12 000 people in a certain country are diagnosed with thyroid cancer every year which accounts for 1 of all cancer cases It occurs in women three times as frequently as in men Fort thyroid cancer can be treated successfully in many cases with radioactive iodine or 1 131 This unstable form of iodine has a half life of 8 days and is given in small doses measured in millicuries a Suppose a patient is given an initial dose of 100 millicuries Find the function that gives the amount of 1 131 in the body after 120 days b How long does it take for the amount of 1 131 to reach 15 of the initial dose c Finding the initial dose to give a particular patient is a critical calculation How does the time to reach 15 of the initial dose change if the initial dose is increased by 5 a Suppose a patient is given an initial dose of 100 millicuries Find the function that gives the amount of 1 131 in the body after 120 days y t Tyne an expression Round coefficients to six decimal places as needed

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