Posted by **Jordan** on Monday, September 17, 2007 at 5:28pm.

The Circumference and area of a circle of radius r are givin by 2 [pie] r and [pie] r[2], respectively use 3.14 for the constant [pie]

A. What is the circumference of a circle with a radius of 2 m?

B.What is the area of a circle with a radius of 2 m?

C. The earth has a radius of about 3960 miles. Approximately how long is the equator?

- Algebra -
**Ms. Sue**, Monday, September 17, 2007 at 5:40pm
Solve these problems.

A. C = 2*2*3.14

B. A = 3.14*2*3.14*2

C. C = 3.14*2*3960

We'll be glad to check your answers.

- Algebra -
**Jordan**, Monday, September 17, 2007 at 5:43pm
A. C = 12.14?

B. A = 18.84. 28?

C. C = 24868.8?

- Algebra -
**Ms. Sue**, Monday, September 17, 2007 at 5:57pm
A. Please do the multiplication again. You're close but not right.

B. I mistyped the formula above. It should be:

A = 3.14*2*2

C. You're right! :-)

- Algebra -
**Jordan**, Monday, September 17, 2007 at 6:00pm
A. C= 12.56

B. A= 12.56

C. Alright!

- Algebra -
**Ms. Sue**, Monday, September 17, 2007 at 6:11pm
Yay! You have all of them right now. The only addition is that the answer to B is 12.56 square meters.

## Answer this Question

## Related Questions

- AP Calculus - The radius of a circle is decreasing at a constant rate of 0.1 ...
- Math - The radius of a circle is decreasing at a constant rate of 0.1 ...
- AP Calculus - The radius of a circle is decreasing at a constant rate of 0.1 ...
- geometry - how do you find the circumference of a circle with the area of 169 ...
- math algebra? - A circle has circumference of 56.52 ft. What is its area? Use 3...
- math - Mrs.penn has a circular tablecloth with a circumference of 29 feet. Which...
- Math - If the circumference of a circle is 18 ( pie symbol), what is the area of...
- Math - Find the rate of change of the area of a circle when its radius is 18.0 m...
- math - how do i solve the problem what is the radius of a circle with a ...
- Geometry - I need help on a problem thats on formula for circumference. A circle...