Can someone please help me with this geometry?

25 points!!!

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

52 cm radius = diameter = area = circumference = circumfer