Answer: 44 out of the 100 households threw away milk cartons;
(2) 10000×44%=4400 (households),
A: If 654.38+00000 families drink milk regularly, 4400 families throw away milk boxes.
(3)4400×90÷6
=396000÷6,
= 66000 (pieces),
A: The milk cartons thrown away in one year can be made into 66,000 rolls of paper.