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Polonium-210 was originally manufactured 120 days earlier to have a 1 μCi activity. However, when measured...

Polonium-210 was originally manufactured 120 days earlier to have a 1 μCi activity. However, when measured with a Geiger counter the source is emitting 1500 counts per minute. The half-life of Polonium-210 is 138.376 days. What fraction of the decays are being captured by the Geiger counter?

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