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C. 56.52 in
The circumference of a circle is calculated using the formula: Circumference = 2Ï€r, where r is the radius of the circle.
Given that the radius is 9 in, substitute this value into the formula:
Circumference = 2 * 3.14 * 9
Circumference = 18 * 3.14
Circumference = 56.52 in
Therefore, the circumference of the circle is 56.52 inches.