Aconstruction crew builds 2 floors of a skyscraper every 10 days. how log will it take for the crew to build 15 floors on the skyscraper

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.