Can u pls help me with this question

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

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

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much