Answer:
80
Step-by-step explanation:
I hope this will help. I was really calculating maybe keep on trying on A peice of paper.:)
Answer:
C = 75.36
A = 452.16
Step-by-step explanation:
Find the radius r by finding the distance between (12,-1) and (0,-1) using the distance formula.

The radius is 12.
So the circumference of the circle is 
So the area of the circle is 
Answer:
The letter "x" is often used in algebra to mean a value that is not yet known.
Step-by-step explanation:
Area=πr^2
Area=π(16)^2
Area≈804.2477 cm^2
I left the number large enough in case you need to round it off to some other decimal place.