If 6 of the 13 books are new, then 7 of them are used. The ratio of new (6) to used (7) is
6:7 or 6/7
Ratio of all books (13) to used books (7) is
13:7 or 13/7
6.70-10.00=3.30
So you get $3.30 as change
The answer is 2 because you multiply 9.8 times the mass and that will give you your answer
Quadrant ll
Hope this helps
