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OpenStudy (x3_drummerchick):
How do i solve this!? Will give medals! Radium-221 has a half-life of 30 sec. How long will it take for 84% of a sample to decay? (Round your answer to the nearest whole number.)
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OpenStudy (x3_drummerchick):
@Nnesha
OpenStudy (x3_drummerchick):
@Jhannybean
OpenStudy (x3_drummerchick):
@dan815
OpenStudy (dan815):
okay so basically
OpenStudy (dan815):
we keep losing 1/2 ever 30 seconds
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OpenStudy (x3_drummerchick):
i found the 'r' by doing ln2/30
OpenStudy (dan815):
wait i have to figure it out too
OpenStudy (dan815):
|dw:1443224796743:dw|
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