Aprincipal of $4900 is invested at 8.5% interest, compounded annually. how much will the investment be worth after 7 years? round to the nearest dollar

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.