miagardiner132 miagardiner132

23-05-2022
English

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if an element has a half-life of 20 million years, and there is 6.25% of it remaining in a rock, how old is that rock?

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sadvibesforever123 sadvibesforever123

23-05-2022

working out: 6.25% = 4 half lives (20x4=80ma) 80ma is how old the rock is

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