document.write( "Question 257780: If the top of a coke can has a 7 cm diameter, what is the radius, circumfrence and area?
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Algebra.Com's Answer #189742 by rfer(16322)\"\" \"About 
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r=.5d
\n" ); document.write( "r=3.5 cm
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\n" ); document.write( "c=pi*d
\n" ); document.write( "c=7*3.1416
\n" ); document.write( "c=22 cm
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\n" ); document.write( "a=pi*r^2
\n" ); document.write( "a=3.14*3.5^2
\n" ); document.write( "a=3.14*12.25
\n" ); document.write( "a=38.47 sq cm
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