Chemistry

Carbon-14 has a half-life of 5730 years In a plant fossil you find that the 14 C has decayed to 1/8 of the original amount how long ago was this plant

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asked by Shay
  1. 1/8=e^-.693t/5630

    4730 ln(1/8)=-.693t

    solve for t

    another way:
    1/8=(1/2)^t

    t=3 halflives

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