Question

question 9 of 10 which is the best estimate of the circumference of this circle?

Explanation:

Step1: Recall circumference formula

$C = 2\pi r$

Step2: Identify radius value

$r = 3$

Step3: Substitute and estimate

$C=2\times\pi\times3\approx2\times3\times3 = 18$ (using $\pi\approx3$)

Answer:

C. 18 units