Answer Happy

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Radium has a half-life of 1600 years. How many years does it take for 90% of a given amount of radium to decay? O 1600 in 5 O O O 1600 In 5 1600 In 2 1600 in 10 1600 in 10 In 2 1600 in 2 1500 in 6 1600 in 2 In 10