Question

Find the exact circumference of a circle with the given radius. 3¼ inches C = A.6.25π in. B. 6.5π in. C. 23.25π in.

Answer 1

The correct answer would be 6.5. because you would round 6 1/2 into 6.5. Also be sure when you are multiplying you have a mixed number.

Explanation:

Answer 2

Answer: B.
`6.5\pi\text{ inches}`

Explanation:

The circumference of a circle is given by :-

`C=2\pi r` , where r is the radius of the circle.

We are given that the radius of a circle is
`3(1)/(4)` inches.

First we convert
`3(1)/(4)` into improper fractIon, we get

`3(1)/(4)=(3(4)+1)/(4)=(13)/(4)`

Now, circumference of the circle will be :-

`C=2\pi *(13)/(4)\\\\ C=(13)/(2)\pi\\\\ C=6.5\pi\text{ inches}`

Hence, the exact circumference of a circle =
`6.5\pi\text{ inches}`