Okay, first thing first... you are amazing
second, number 7 is 5/2
number 10 is 3/6
hope this helps and have a w-o-n-d-e-r-f-u-l d-a-y :)
and merry christmas
The delivery man can carry about 14 boxes of books
D is the answer
40050 divided by 3.14 is 12754.77707