I think #7 is 40
#9 is 300
Providing a short wikipedia definition here: "In mathematics, a rational number is any number that can be expressed as the quotient or fraction"
So any fraction would work for this question I believe?
Answer: (C)
<u>Solution:</u>
Jack bought 3 bars for $4.26 thus the cost of each bar can be defined as:

⇒
Negotiating in trade means you are bartering.