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Amount left = Initial Amount/2n
Amount left/ Initial Amount = 2-n
=>0.25 = 2-n
=>1/4 = 2-n
=>2-2 = 2-n
=> n=2
Hence the element will take 2 x 5730 =11460 years to reach 25%
Solution
Amount left = Initial Amount/2n
Amount left/ Initial Amount = 2-n
=>0.25 = 2-n
=>1/4 = 2-n
=>2-2 = 2-n
=> n=2
Hence the element will take 2 x 5730 =11460 years to reach 25%

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Amount left = Initial Amount2nAmount left Initial Amount = 2-n.pdf

  • 1. Amount left = Initial Amount/2n Amount left/ Initial Amount = 2-n =>0.25 = 2-n =>1/4 = 2-n =>2-2 = 2-n => n=2 Hence the element will take 2 x 5730 =11460 years to reach 25% Solution Amount left = Initial Amount/2n Amount left/ Initial Amount = 2-n =>0.25 = 2-n =>1/4 = 2-n =>2-2 = 2-n => n=2 Hence the element will take 2 x 5730 =11460 years to reach 25%