document.write( "Question 1163973: Write an equation of the circle that determines the boundary of the region where planes can be detected if the range of the radar is 100 kilometers and the radar is at the origin. How an air traffic controller's job would be different for a region whose boundary is modeled by instead of? \n" ); document.write( "
Algebra.Com's Answer #788237 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "The equation of a circle of radius centered at is:\r
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\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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