B. Not a function because both (3,6) (4,6) have the same y making them not a function
Please specify which agency are you trying to compare
The formula for a cone is

insert 20 for your height and rearrange the formula to find the radius. Leave a comment if you need more help.
Answer: B.
Step-by-step explanation: Remember, circumfrence is 2 pi r. multiply 6.1 and 2. That is 12.2. Then, use a calculator to multiply that to get approx 76.65. Round that up to 76.7.
No it is not reasonable because there would actually be 96 items in all