Help im dum leaf & stem diagram

Pls! does anybody know a shortcut for answering these types of questions in the future?

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.

If a is a nonzero real number then the reciprocal of a is