Question

question 2 of 10 which is the best estimate of the circumference of this circle?

Explanation:

Step1: Recall the circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $r$ is the radius of the circle. Here, the radius $r = 3$.

Step2: Approximate $\pi$ and calculate

Approximate $\pi\approx3$. Then $C = 2\times3\times3= 18$.

Answer:

C. 18 units