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You have 400 mg of a radioisotope with a half-life of 5 minutes. How much will be left after 30 minutes? A 6.25mg

B 12.5 mg

C 100 mg

D 50 mg

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You have 400 mg of a radioisotope with a half-life of 5 minutes. How much will be left after 30 minu...
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