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Question 12 - of 13 Step 3 of 3 01:43:55 The half-life of radium-225 is approximately 14.9 days. Step 3 of 3: How much of

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Question 12 - of 13 Step 3 of 3 01:43:55 The half-life of radium-225 is approximately 14.9 days. Step 3 of 3: How much of a 15 gram sample of radium-225 would remain after 9 days? Round to three decimal places. AnswerHow to enter your answer (opens in new window) 2 Points Keypad Keyboard Shortcuts grams rev

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