False because a number is rational if we can write it as a fraction where the top number of and bottom number are both whole numbers but irrational numbers is any number that is not rational. It is a number that cannot be written as a ratio of two integers(or cannot be expressed as a fraction)
I'm not sure how long you want this, but I did it when x = 0 all the way to when x = 5.
x y
0 5
1 4
2 3
3 2
4 1
5 0
10% means 10 out of 100.
So 10% of 120=

So total number of books now = 120+12 =
132
18/3.5=5.1 so you do 14/5.1=2.7
so your answer is 2.7 in
6000 - 600 = 5400
18 x $325 = 5850
Difference is $450
325 x 7.692% = 450
Finance charge is 7.692%