document.write( "Question 274211: Diameter of a circle. If the diameter of a circle is
\n" ); document.write( "1.3*10^12 meters, then what is its radius?
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Algebra.Com's Answer #200127 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
It's half that.
\n" ); document.write( "d = 1.3*10^12 meters
\n" ); document.write( "r = 0.65E-12 meters
\n" ); document.write( "r = 6.5E-11 meters
\n" ); document.write( "or 6.5*10^-11 if you prefer inconvenience.
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\n" ); document.write( "I'd go with 0.65 picometers myself
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