document.write( "Question 1198964: Kyle Invests in an account earning 4.75% interest compounded continuously. How long will it take to double his investment? \n" ); document.write( "
Algebra.Com's Answer #833132 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( " The continuous compounding interest formula from Financial Mathematics is given as follows:\r
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\n" ); document.write( "\n" ); document.write( "\"A=Pe%5E%28rt%29\"\r
\n" ); document.write( "\n" ); document.write( "\"r=4.75\"% =\"0.0475\"\r
\n" ); document.write( "\n" ); document.write( "to double his investment: \"A=2P\"\r
\n" ); document.write( "\n" ); document.write( "\"2P=Pe%5E%280.0475t%29\".........simplify\r
\n" ); document.write( "\n" ); document.write( "\"2=e%5E%280.0475t%29\"........take natural logarithm of both sides\r
\n" ); document.write( "\n" ); document.write( "\"ln%282%29=ln%28e%5E%280.0475t%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"ln%282%29=%280.0475t%29ln%28e%29\"\r
\n" ); document.write( "\n" ); document.write( "\"0.0475t=ln%282%29%2Fln%28e%29\"..........\"ln%28e%29=1\"\r
\n" ); document.write( "\n" ); document.write( "\"0.0475t=ln%282%29\"\r
\n" ); document.write( "\n" ); document.write( "\"t=ln%282%29%2F0.0475\"\r
\n" ); document.write( "\n" ); document.write( "\"t=14.6\"\r
\n" ); document.write( "\n" ); document.write( "Answer: Kyle will double his investment in \"14.6\" years.\r
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