document.write( "Question 386715: What annual rate of return is earned on a $4,000 investment when it grows to $9,600 in eight years? Round to nearest 1 decimal place \n" ); document.write( "
Algebra.Com's Answer #273457 by robertb(5830)\"\" \"About 
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\"9600+=+4000%281+%2B+r%29%5E8\";
\n" ); document.write( "\"9600%2F4000+=+%281%2Br%29%5E8\";
\n" ); document.write( "\"root%288%2C9600%2F4000%29+=+1+%2B+r\";
\n" ); document.write( "\"r+=+root%288%2C9600%2F4000%29+-+1\", or
\n" ); document.write( "11.6 %, to 1 decimal place.
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