Answer:
4 divided into 4000 is 1000 with no remainders
4/4000=1000
The answer to this question is A prime number. A prime number has only two factors one an itself. Opposite to composite which has more than two. Example!
Prime:2,3,5,7
Composite:4,6,8,9
If the price of paper increases by a lot, then book producers would respond by supplying less books.
It would be 6 I hope I helped