SOLUTION: A radioactive isotope, selenium, used in the creation of medical images of the pancreas,
has a half-life of 119.77 days. If 100 milligrams are given to a patient, how many millig
Question 1157954: A radioactive isotope, selenium, used in the creation of medical images of the pancreas,
has a half-life of 119.77 days. If 100 milligrams are given to a patient, how many milligrams
are left after 20 days? Work must be shown! Answer by ikleyn(52795) (Show Source): You can put this solution on YOUR website! .
The general formula is
M = ,
where M0 is the initial mass; M is the current (remaining) mass, and "t" is time in days.
So, the answers (and the calculation work) are
M = 100*((1/2)^(20/119.77)) = 89.07 grams. ANSWER