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

Answer:

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.  

Step-by-step explanation:

Answer 2

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

Step-by-step 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 $3\dfrac{1}{4}$ inches.

First we convert $3\dfrac{1}{4}$ into improper fractIon, we get

$3\dfrac{1}{4}=\dfrac{3(4)+1}{4}=\dfrac{13}{4}$

Now, circumference of the circle will be :-

$C=2\pi \times\dfrac{13}{4}\\\\ C=\dfrac{13}{2}\pi\\\\ C=6.5\pi\text{ inches}$

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