document.write( "Question 470580: Please help I don't understand \r
\n" ); document.write( "\n" ); document.write( "Solve the problem. Be sure to show all of your work.\r
\n" ); document.write( "\n" ); document.write( "The area of a circle with radius r is given by the formula\r
\n" ); document.write( "\n" ); document.write( "A = πr2\r
\n" ); document.write( "\n" ); document.write( "Find the area of a circle with radius 7 centimeters. Use 3.14 for π.
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Algebra.Com's Answer #322752 by ccs2011(207)\"\" \"About 
You can put this solution on YOUR website!
The given area equation: \"A+=+pi%2Ar%5E2\"
\n" ); document.write( "gives the relationship between the area and radius of a circle.
\n" ); document.write( "It is a direct relationship so as radius increases, so does the area.
\n" ); document.write( "To find a value for A (area) you need a value for r (radius), then substitute it in.
\n" ); document.write( "Given: radius = 7, pi = 3.14
\n" ); document.write( "Substitute these into \"A+=+pi%2Ar%5E2\"
\n" ); document.write( "\"A+=+%283.14%29%2A%287%5E2%29\"
\n" ); document.write( "Do the multiplication
\n" ); document.write( "\"A+=+%283.14%29%2A%2849%29\"
\n" ); document.write( "\"A+=+153.86\"
\n" ); document.write( "Therefore the area of a circle with radius of 7 cm. is 153.86 sq.cm.
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