The half-life of Iodine-131 is approximately 8 days. What is the amount of Iodine-131 left from a 35 gram sample after 32 days?
32 days means 4 half lives since one half life is 8 days.
That means it will be halved 4 times... so the ratio between the initial amount and the amount after 32 days will be
There will be