99. A drug tagged with 23 Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was
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99. A drug tagged with 23 Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was
99. A drug tagged with 23 Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was 1.2×104 Bq, what is its activity (R) after it has been on the 43 shelf for 3.0 h? Bq
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