Answer:
~9.995cm
Step-by-step explanation:
Circumference is given by the formula c=πd.
This can be rearranged to d=[tex]\frac{c}{\pi }[/tex] by dividing both sides by π.
With inputting c=31.4, this gives d=[tex]\frac{31.4}{\pi }[/tex].
This can be solved to 9.9949304261710270862859003397939, which can be rounded to 3 decimal places to 9.995.
**This question involves circumference and diameter formulas, which you may wish to revise. I'm always happy to help!