Question: A phosphorus - 3 2 solution is injected into the root system of a plant. A Geiger counter is used to detect the movement of

A phosphorus-32 solution is injected into the root system of a plant. A Geiger counter is used to detect the movement of the phosphorous throughout the plant. After 30 days, the radioactivity level is down to 23% of its original level. Determine the half-life of P-32.

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