# Math

posted by .

How do you find the circumference of something when you of 13in as your radius?

• Math -

To find the circumference of a circle, use this formula:

C = 2r * pi

C = 2 * 13 * 3.14

• Math -

Thank you!!

• Math -

You're welcome.

## Similar Questions

1. ### English

Hello, I have this question to approach creating a negative message to a superior versus a colleague to approach them would I tell them they are doing something wrong or not, I am lost for this question. Thanks Clark, you have a long …
2. ### Geometry

Hello, Can you please tell me if I have the correct answer?
3. ### Circumference

Find the circumference and area of cirlce with a radius of 3 feet. Let n stand for pi Circumference=2n x (3)=6 or 18.84 or 18 6/7 I understand how to calulate the circumference. The answer that the book gives of 18 6/7. I am not clear …
4. ### Chemistry :(

hello, i would be glad if someone answer to my question fast please as i am having a class test tomorrow. So here's the question: Q:An Alkaline with 16 carbons has a molecular formula of: (a)C16 H16 (b)C16 H34 (c)C16 H8 (d)C16 H32 …
5. ### English

1. Can you find something sweet? Yes. Here is a sweet cake. 2. Can you find something red?
6. ### Math 7 - NYS Math Exam Review Help!

19. The circumference of the circle below is 25.12 centimeters ***** There is a circle and then there is a line and written radius C = 2(pi)r Which is the best estimate for the length of the radius of the circle?
7. ### Math

Hello, could someone please go over the steps for this question?
8. ### Math

Hello, could someone please go over the steps for this question?
9. ### math

Problem 1:A semi-circular garden has a radius of 10 meters. What is its area?
10. ### Geometry

Hello! Thanks for checking my question out! ____ 9. Find a point E on CD such that the ratio of CE with CD is 3/8. Image URL: goo.gl/6stTqe a) -7 b) -5 c) -3 d) -1 My Answer: A Could someone please check my answer?

More Similar Questions