Answer: C
Step-by-step explanation:
The area of a circle is equal to:

r = 1/2 the diameter
1/2 of 14 is 7
7 squared is 49
<em><u>The area is 49π</u></em>
The quotient of 78,600 and 12 is 6,550
x is -31 because you had to add -11 and -20
Perimeter is the outside of it and the perimeter is the inside of it, so I'm pretty sure you would have to do both but if u have to do one then I would go with area