document.write( "Question 640832: convert 10101two to base ten \n" ); document.write( "
Algebra.Com's Answer #403414 by jim_thompson5910(35256)\"\" \"About 
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1(2^4)+0(2^3)+1(2^2)+0(2^1)+1(2^0)\r
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\n" ); document.write( "\n" ); document.write( "1(16)+0(8)+1(4)+0(2)+1(1)\r
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\n" ); document.write( "\n" ); document.write( "16+0+4+0+1\r
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\n" ); document.write( "\n" ); document.write( "21\r
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\n" ); document.write( "\n" ); document.write( "So 10101 base 2 = 21 base 10
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