The half life of iodine-131 is 5 days. Suppose you receive a 13mCi dosefor cancer treatment. How much would be left after 40 days?
A)1.75mci
B)0.007mci
C)0.05mci
D)2mci
+37157 40 days / 5 days/ half life = 8 half lives
13 mCi * (1/2 )8 = .05 mCi
+37157 40 days / 5 days/ half life = 8 half lives
13 mCi * (1/2 )8 = .05 mCi
