Thread: help needed half-life logrithms

the half life of sodium-24 is 14.9h. suppose a hospital buys a 40mg sample of sodium-24.
a.) how much of the sample will remain after 48h?
b.) how long will it be until only 1mg remains?

First solve for .

where is in hours. So we have

how i do it if i were to put in logs into that equation and put it in my calculator?

You do need to use logs here.





From here apply