Answer:
2
Step-by-step explanation:
Using the distance formula,

We just need to plug in the numbers.
So 
Then we simplify it to

Finally, we get
, which is
when simplified.
Answer: a
Step-by-step explanation:
Answer: take 20% off
Step-by-step explanation:
the first one is correct because you would be getting 20% off of any purchase.
To find the answer of this problem you need the formula for a cylinder.
V= pi* r^2 * h just plug in your numbers and you have the answer.
You also need to remember that diameter is just twice the radius.