Problem: Approximately how many half-lives must pass for the amount of radioactivity in a substance to decrease to below 1% of its initial level?

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Approximately how many half-lives must pass for the amount of radioactivity in a substance to decrease to below 1% of its initial level?

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Our tutors have indicated that to solve this problem you will need to apply the First Order Half Life concept. You can view video lessons to learn First Order Half Life. Or if you need more First Order Half Life practice, you can also practice First Order Half Life practice problems.