algebra 1
posted by trixie .
a high school wrestling mat must be square with 38foot 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.

The outer circle has radius s + 9. Its area is pi(s+9)^2, and the area outside the outer circle is (38)^2  pi(s+9)^2