Question: At time 0 , a sample contains 2 5 mg of radioactive parent material X and 1 . 6 mg of its daughter material Y

At time 0, a sample contains 25 mg of radioactive parent material X and 1.6 mg of its daughter material
Y. After 5.0 minutes, the sample contains 22.1 mg of parent material X and 4.5 mg of material Y.
Determine the half-life of material X as it decays to Y.

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