Solution
For this case we have the diemater given
D= 2.4 cm
then the radius is:
r= 2.4/2= 1.2cm
And then we can find the circumference with the following formula:
[tex]C=2\pi r=2\pi\cdot1.2\operatorname{cm}=7.54\operatorname{cm}[/tex]
Then the answer is:
A. 2.4 pi cm
