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A radioactive material initially is observed to have an activity of 1.71 x 10 decays/s. If 6.00 hours later it is observed to have an

A radioactive material initially is observed to have an activity of 1.71 x 10 decays/s. If 6.00 hours later it is observed to have an activity of 2.20 x 10- decays/s, what is its half-life? T1/2 = 7.30e3 X Hours

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