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.
