document.write( "Question 345188: To save for their retirement, a couple deposits $4000 in an account that pays 5.9% annual interest compounded quarterly. What will be the value of their investment after 20 years? \n" ); document.write( "
Algebra.Com's Answer #246876 by nerdybill(7384)\"\" \"About 
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To save for their retirement, a couple deposits $4000 in an account that pays 5.9% annual interest compounded quarterly. What will be the value of their investment after 20 years?
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\n" ); document.write( "A = P(1 + r/n)^(nt)
\n" ); document.write( "where
\n" ); document.write( "A is amount after time t
\n" ); document.write( "P is the initial amount
\n" ); document.write( "r is the interest rate
\n" ); document.write( "n is the number of time it is compounded
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\n" ); document.write( "Plugging in what is given:
\n" ); document.write( "A = 4000(1 + .059/4)^(4*20)
\n" ); document.write( "A = 4000(1 + .059/4)^80
\n" ); document.write( "A = 4000(1 + 0.01475)^80
\n" ); document.write( "A = 4000(1.01475)^80
\n" ); document.write( "A = 4000(3.226)
\n" ); document.write( "A = $12905.80
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