Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 22 h? =________ answer should be written in the correct amount of significant figures

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter30: Nuclear Physics
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Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 22 h?
   =________

answer should be written in the correct amount of significant figures

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