PLEASE HELP ME WITH THOSE TWO QUESTIONS 1) How many radians are in a quarter of a circle?

2) How many degrees are in 11π over 6?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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.