Can you guys please help me out here?

Answer:
c= about 3053.63
Step-by-step explanation:
first find the radius
975/2 =486
then do the circumference equation
c= 2* pi*r^2
c= 2* 3.14 *(486)^2
c= 2* 3.14 *236196
c= about 3053.63
i think that's right
hope this helps