the diameter of circle A is 2.3 units. Find the circumference of the circle

A circle with a diameter of A=2.3 units is given, it is required to find the circumference of the circle.
The formula for the circumference of a circle of diameter A is:
[tex]C=\pi A[/tex]Substitute A=2.3 into the formula:
[tex]C=\pi(2.3)=2.3\pi\text{ units}[/tex]The correct option is c.