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The radioactivity of an element decreases by 30 percent in 900 days. (a) Determine the half-life of the element, rounded to a whole number: (b)

The radioactivity of an element decreases by 30 percent in 900 days. (a) Determine the half-life of the element, rounded to a whole number: (b) Determine the number of days, rounded to a whole number, for a sample of 100 mg to decay to 57 mg

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