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Mathematics, 30.04.2021 17:30 KariSupreme
Radioactive iodine treatment is so successful at treating hyperthyroidism that it has virtually replaced thyroid surgery. To the nearest full day, determine how long it will take for 400 millicuries of I-131, which has a half-life of 8 days, to decay to 3.125 millicuries.
7 days
8 days
56 days
128 days
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