Solve.A formula for the circumference of a circle is C = 2?r, where r is the radius of the circle. (i) Solve the formula for r. (ii) A circle has a circumference of 42? meters. Find the radius, r, of the circle.
A. (i) r = 
(ii) 21 m
B. (i) r = 
(ii) 42 m
C. (i) r = 
(ii) 7 m
D. (i) r = 
(ii) 11 m
Answer: A
Mathematics
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