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Iodine 131 is radioactive isotope of Iodine that is used to treat isolated cancers in the thyroid and prostate. Minute quantities can be administered in

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Iodine 131 is radioactive isotope of Iodine that is used to treat isolated cancers in the thyroid and prostate. Minute quantities can be administered in the blood stream that preferentially accumulate in the thyroid while external seeds can be implanted into prostate tissue. The half-life is 8.02 days; meaning it will take 8.02 days for the amount to decay to 50% of its original quantity. Calculate the rate of decay k assuming a continuous decay modelf (x) = Ae -ki. k = Round to four decimal places Calculate the length of time in days, that it will take a quantity of Iodine 131 to decay to 1% of its original quantity. Answer: days Round to one decimal place SAVE PROGRESS SUBMIT A

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