Is 0.45 equal to 4/10

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.

Standard deviation of 19,29,21,22,23

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.