Question

find correct two decimal places, the radius of the circle with the given circumference: 35cm

Answer 1

$C=2 \pi r$
C - circumference, r - radius

$C=35 \ [cm] \\ \\ 35=2 \pi r \\ r=\frac{35}{2 \pi} \\ r=\frac{17.5}{\pi} \\ \boxed{r \approx 5.57 \ [cm]}$

Answer 2

$C=2\pi r=35\\ 2\pi r=35\\ r=\dfrac{35}{2\pi}\approx5.57\text{ cm}$