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10 May, 03:53

How much of a radioactive substance must be presented to decay to 40 grams in 9 years if the half-life of the substance is 4.6 years?

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  1. 10 May, 07:15
    0
    155.25 grams

    Step-by-step explanation:

    40 = X (½^ (9/4.6))

    X = 40 : (½^ (9/4.6))

    X = 155.25 grams
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