darl5eykenaPY3
darl5eykenaPY3 darl5eykenaPY3
  • 21-09-2016
  • Mathematics
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a radioactive material loses 25% of its mass in 10 minutes. find its half-life.

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CaptainBeyond
CaptainBeyond CaptainBeyond
  • 05-10-2016
20 minutes??????????????
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