Answer:
8.75 hours
Explanation:
We can use ratios to solve. Put the pages over the time and set them equal.
4 pages 7 pages
------------- = ---------------
5 hours x hours
Using cross products
4 * x = 5 *7
4x =35
Divide by 4 on each side
4x/4 = 35/4
x =8.75 hours