document.write( "Question 252952: kevin designs a sprinkler system for his yard. one rotation of the sprinkler waters a circle with an area of 225π square feet. What is the radius,r,of the circle the rotating sprinkler waters? \n" ); document.write( "
Algebra.Com's Answer #185124 by drk(1908)\"\" \"About 
You can put this solution on YOUR website!
Area of circle has the formula:
\n" ); document.write( "\"A+=+pi%2Ar%5E2\"
\n" ); document.write( "Your area was given as 225pi, so we have
\n" ); document.write( "\"225%2Api+=+pi%2Ar%5E2\"
\n" ); document.write( "divide by pi to get
\n" ); document.write( "\"225+=+r%5E2\"
\n" ); document.write( "take a square root and we get
\n" ); document.write( "\"r+=+15+feet\"
\n" ); document.write( "
\n" );