For this case we have to:
x: It is the variable that represents the number of compact discs.
The cost function must be found considering that each disk costs $7.13. So:

Thus, to find the total cost of "x" compact discs (in $) we substitute the number of discs in the cost function.
Answer:

1) 2/3 <7/8
2) 2/4>2/6
3) 12000
4)
5)2x8=16
6) 9x4=36
4)1/3<3/4
5)3/4>1/4
6) Green group ate more pizza
7) Ben’s ride was longer
8)
The first 4 and 8 I didn’t do because I didn’t understand what they were asking for
It is 4/25, since she pulled a red marble 4 times out of 25 times the experiment was conducted.
No 6.98x11.12 does not equal 776.176. it equals 77.6176