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Technetium-99m is very useful in diagnostic imaging since it has a short effective half-life of 4.8 hours. If a patient receives a dose with an
Technetium-99m is very useful in diagnostic imaging since it has a short effective half-life of 4.8 hours. If a patient receives a dose with an activity of 64.5 mCi of technetium-99m for cardiac imaging, how much radioactivity will be left in the patients body 48 hours after injection? Express the radioactivity to three significant figures and include the appropriate units.
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