Question

Please help, image below. Thank you!

Answer 1

10 Inches

Hope it helps, have a fantastic day.

Explanation:

The Circumference of a circle can be displayed by this formula:

`C = 2\pi r`

`C` is the circumference, and
`r` is the radius.

So just plug in 31 for
`C`, and simplify:

`31 = 2\pi r`

Because the question is asking for the diameter, we only need to divide both sides by pi, as
`2r` is the same thing as diameter.

`9.87 = 2r` (rounded to the nearest hundredth)

We can even rewrite
`2r` as
`d`, which stands for diameter, to make things a little simpler.

`9.87 = d`

Now we just take 9.87, and round it to the nearest whole number, and we get 10. So your answer is 10 Inches.

Hope it helps, have a fantastic day.