please help me with these!! I don’t understand

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

What is the y intercept of f(x)=(1/2)^x?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,