Mathematics, 23.02.2021 21:20 shakira11harvey6

Madame Curie made some radium in her lab. She used 2/5 kg of the radium in an experiment and had 1 1/4 kg left . A. How much radium did she have at first?
B. If she performed the experiment twice, how much radium would she have left?

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Madame Curie made some radium in her lab. She used 2/5 kg of the radium in an experiment and had 1 1...