document.write( "Question 1029116: How long will it take $1100 to double itself if it is invested at 6% interest compounded semiannually? (Express the answer to the nearest tenth.)\r
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Algebra.Com's Answer #644158 by robertb(5830)\"\" \"About 
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Using the formula \"A+=+P%281%2Br%2Fn%29%5E%28nt%29\" with A = 2P, r = 0.06, n = 2, we get\r
\n" ); document.write( "\n" ); document.write( "\"2+=+%281%2B0.06%2F2%29%5E%282t%29\"\r
\n" ); document.write( "\n" ); document.write( "<==> \"2+=+1.03%5E%282t%29\" ==> \"t+=+ln2%2F%282ln1.03%29\"\r
\n" ); document.write( "\n" ); document.write( "==> t = 11.7 years.
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