physics
posted by Mira .
The half life of a radioactive sample is 6.93 days.after how many days will only one tenth of the sample be left behind?

.1=e^.693t/6.93
.1=e^.1
ln.1=.1t
t=10ln(.1)
posted by Mira .
The half life of a radioactive sample is 6.93 days.after how many days will only one tenth of the sample be left behind?
.1=e^.693t/6.93
.1=e^.1
ln.1=.1t
t=10ln(.1)