How do you right 7 to the -2 power as a simple fraction

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

Yo y do yall have 2 stars that means yall wrong bro

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have