Step-by-step explanation:
9i√2
-18
so therefore the answer is 9i√2
1265 divided by 34 is 37.2. That means he will need another shelf for the extra 0.2 books. In total he will need 38 shelves
3.
You could probably look up a fancy explanation of why this is, by I just went the easy route.
1 is definitely possible.
2 is too!
(Sorry if the images are hard to see)
So the answer has got to be 3!
Hope this helps!