[Solved] A radioactive isotope starts with 230 mCi

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A radioactive isotope starts with 230 mCi. What is the activity after 7 years if it has a half-life of 365 days? How many days

A radioactive isotope starts with 230 mCi. What is the activity after 7 years if it has a half-life of 365 days?

How many days will it take Iodine 131 to reduce the source to 12.5% of its original value?

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