The answer is deductive reasoning. The deductive reasoning refers to a type of reasoning that starts from the general to go to the particular, deducting or inferring conclusions through certain premises. It is the type of reasoning most used in mathematics
The operation is times then subtract because when the ? says difference that mean subtract and it's times because it says 6 juice packs for $2.70 and that's the operations
We are given:

To simplify this inequality, we can add 2 to all three sides. When we do that, we are left with:

After we simplify that, we can divide all sides by -6. Here is what we get:

When you simplify, your final answer will be:

A: 25.12 (26 if your rounding)
B: You have to multiply R by 2 then by pi (3.14)
C: 10.5 (11 if your rounding)
Step-by-step explanation:
For a: A circle's circumference is its diameter multiplied by pi (3.14) To get the diameter you would multiple the radius by 2. Therefore your answer being 25.12 (Round to 26 if you want)
For c: Divide 65 by pi then that answer by two.