Mrs. o'Brien bought 50 new books for the school library if mrs. o'Brien puts 9 books on each shelf, how many shelves will she need?

Which of the following is the true for f(x) = 5cos

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units