If a Radioactive Isotope That Was Injected into Your Bloodstream $\frac{1}{16}$

question 125

Multiple Choice

If a radioactive isotope that was injected into your bloodstream has a half life of 5 hours, how many hours do you have to wait before the amount of this isotope in your body is $\frac{1}{16}$ its original amount?

• A) 20
• B) 25
• C) 5
• D) 10
• E) 15

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