Question
If the half life of Ir - 131 is 42 days, how much would be remaining after 168 days?
Answers
bobpursley
isn't that four half lives?
amountremaining=origamount*(1/2)^4
or
amount=orig *e^(-.693*168/42)
amountremaining=origamount*(1/2)^4
or
amount=orig *e^(-.693*168/42)