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Posted by on Tuesday, August 28, 2012 at 6:58pm.

Find the half-life (in hours) of a radioactive substance that is reduced by 10 percent in 5 hours.

  • Math - , Tuesday, August 28, 2012 at 7:04pm

    .6=e^-.603 (5sec/th)

    solve for thalflife.

    ln.6=-.693*5/th

    th=???

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