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13 February, 06:53

If a mineral has a daughter to parent ratio of 3:1 (three daughter atoms for every one parent atom), how many half lives have passed since the mineral formed

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  1. 13 February, 07:01
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    25% means has 2 halflives old.

    The rock is 57 million years, which would be multiplied to 2 (halflives) = 114 million years old.

    Therefore, the halflives of the mineral formed is 2 and 1 halflife there is a total of 57 million years.
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