2000 curies of cesium-37 halflife 3017 years is used in a, Ask an Expert

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2000 Curies of cesium-37 (halflife = 30.17 years) is used in a cell irradiator for radiation biology experiments. If the desired dose is achieved in 5 minutes at the beginning of the calendar year, how much irradiation time is needed to keep the dose the same three months later?

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