document.write( "Question 6400: first question:\r
\n" ); document.write( "\n" ); document.write( "how much money will you have to deposit in the bank today to buy a house, which will be worth $250,000 five years from now? the bank is charging 6% compounded yearly interest?\r
\n" ); document.write( "\n" ); document.write( "250000 = (2.06P)5 250000/5 = 2.06/5 50000?
\n" ); document.write( "250000/ (1 + .06/2) 10\r
\n" ); document.write( "\n" ); document.write( "second question:\r
\n" ); document.write( "\n" ); document.write( "how much money will you have to deposit in the bank today to buy a boat which will be worth $7500 four years from today? use 6% simple interest. \r
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\n" ); document.write( "\n" ); document.write( "hi there, \r
\n" ); document.write( "\n" ); document.write( "ugh! im so stuck., please please help me, thanks! \r
\n" ); document.write( "\n" ); document.write( "jen
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Algebra.Com's Answer #3441 by longjonsilver(2297)\"\" \"About 
You can put this solution on YOUR website!
right then..fairly simple question so long as you understand what compound interest is:\r
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\n" ); document.write( "\n" ); document.write( "Lets start with a definition: Let x = amount we start with. So,\r
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\n" ); document.write( "\n" ); document.write( "now = x
\n" ); document.write( "after 1 year, we will have 1.06x ie 6% increase.
\n" ); document.write( "after 2 years we will have 1.06(1.06x) ie a 6% increase of last year's amount.
\n" ); document.write( "after 2 years we will have 1.06(1.06(1.06x)) ie a 6% increase of last year's amount... etc\r
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\n" ); document.write( "\n" ); document.write( "so, we get a pattern forming:\r
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\n" ); document.write( "\n" ); document.write( "now = x
\n" ); document.write( "after 1 year = \"1.06x\"
\n" ); document.write( "after 2 years = \"1.06%5E2%28x%29\"
\n" ); document.write( "after 3 years = \"1.06%5E3%28x%29\"
\n" ); document.write( "after 4 years = \"1.06%5E4%28x%29\"
\n" ); document.write( "after 5 years = \"1.06%5E5%28x%29\" which is equal to 250000\r
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\n" ); document.write( "\n" ); document.write( "so, \"1.06%5E5%28x%29+=+250000\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+250000%2F%281.06%5E5%29\"
\n" ); document.write( "x = 186,814.55 rounded up to nearest cent.\r
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\n" ); document.write( "\n" ); document.write( "jon.
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