If i do something for 19% of the day how many hours is that

Answer these questions showing your work plz

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.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?