Radioactive iodine is used to determine the health of the thyroid gland. It decays at a rate of 8.56%. Find the one-third life of the substance. Round to the neatest integer or day

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.