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  1. R

    how do I solve Biology half lives?

    How do I solve: The ratio of C-14 to N-14 in a piece of petrified wood is 1/8 of the ratio measured in a fresh sample of wood. How old is the artifact? How long will it take for 7/8 of the C-14 to decay to N-14?
  2. R

    POLL: Have you ever been deeply hurt when a best friend stops being friends with you

    Even though there seem to be no reason there is ALWAYS a reason. They may not want to admit it and you may secretly have a feeling about what it is. My best friend and I were in a musical together and we both like to sing and I had a bigger part then her, and throughout the musical I could feel...
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