Posted by **daisy** on Tuesday, March 1, 2011 at 8:43pm.

a circular track has a radius of 100ft. elena wants to run 2 miles. There are 5,280 ft in a mile.

Can you find the circumference of a circle if you know the radius? explain your answer

- math -
**Helper**, Tuesday, March 1, 2011 at 9:35pm
Circumference, C = 2 pi r

or, C = pi d

C = 2 pi r

C = 2(3.24)(100)

C = 628 feet for one lap

5280 * 2 miles = 10,560 feet

10560/628 = ? = laps in 2 mile

## Answer This Question

## Related Questions

- math - a race track is a mile around circle which equals 5,280 circumference. To...
- Algebra - The Circumference and area of a circle of radius r are givin by 2 [pie...
- Math - 23.What is the approximate circumference of a circle with a radius of 6 ...
- Algebra - 1) A corner lot that originally was square lost 185m^2 of area when ...
- Math - What is the approximate circumference of a circle with a radius of 6 ...
- math - The area of circle c is 81 pi . if the radius of the circle is doubled, ...
- Geometry - A gardener is installing a circular garden. The radius of the circle ...
- Math - A gardener is installing a circular garden. The radius of the circle 28 ...
- triggg - Suppose a circle has a radius of 4.5 inches. If you double the radius ...
- Geometry - What is the circumference of the circle if the radius is: 5x-My ...

More Related Questions