What is the exact circumference of a circle with a radius of 17 millimeters?
A.
8.5π millimeters
B.
17π millimeters
C.
34π millimeters
D.
68π millimeters
please help
A.
8.5π millimeters
B.
17π millimeters
C.
34π millimeters
D.
68π millimeters
please help