State how much therapeutic strength

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Reference no: EM13181935

Cesium-131 is a short lived radioisotope (t 1/2 = 9.7 days) used to treat prostate cancer. How much therapeutic strength does a cesium-131 source lose over 45.0 days?

Express answer as a percentage of the strength the source had at the beginning of the first day.

Reference no: EM13181935

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