Posted by **trixie** on Wednesday, March 5, 2008 at 9:24pm.

a high school wrestling mat must be square with 38-foot sides and contain two circles as shown. suppose the inner circle has a radius of "s" feet and the outer circle's radius is nine feet longer than the inner circle.

*write an expression for the area of the larger circle.

* write an expression for the area of the suqare outside the circle.

*use the expression to find the area if s=1.

- algebra 1...urgent -
**Ms. Sue**, Wednesday, March 5, 2008 at 9:26pm
If your question is so urgent, what have you done to try to solve these problems?

- algebra 1...urgent -
**msp**, Thursday, March 6, 2008 at 10:51am
* area of a circle is r^2 times pi

r=9s so r^2 is 9s^2. Multiply this by 3.14 to get the area of the circle. You can't actually solve it with a number since there is a variable involved.

* Area of a square is length times width

* If s=1, the area of the circle is 9^2 x 3.14. Take this answer and subtract it from the area of your square.

Hope this helps. Good luck!

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