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An isotope of cesium (cesium-137) has a half-life of 30 years. If 4.0 mg of cesium-137 decays over a period of 120 years, how many mg of cesium-137 would remain?
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An isotope of cesium (cesium-137) has a half-life of 30 years. If 4.0 mg of cesium-137 decays over a period of 120 years, how many mg of cesium-137 would remain?

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.,no entiendo ni mierda

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