chemistry
posted by Lily .
Ba140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days?

amount=original*e^(.693t/th)
fractiondecimal= e^(.692*39/13)
posted by Lily .
Ba140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days?
amount=original*e^(.693t/th)
fractiondecimal= e^(.692*39/13)