5.32 A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the circulatory system. If sodium-24 has a half-life of 15 h, what is the activity after each of the following intervals? a. one half-life b. 30 h c. three half-lives d. 2.5 days

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A: Initial amount of sodium-24 = 12 mCi Half life of sodium-24 = 15 hours   use the simple formula: per...

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