document.write( "Question 1124886: Jasmine's car was worth $11,000 at the beginning of 2000 and the value of the car decreased exponentially, decreasing by 20% each year. \r
\n" ); document.write( "\n" ); document.write( "a. Write a function f that determines the value of Jasmine's car (in dollars) in terms of the number of years t since the beginning of 2000.\r
\n" ); document.write( "\n" ); document.write( "b. How many years after the beginning of 2000 was Jasmine's car worth $6,000?\r
\n" ); document.write( "\n" ); document.write( "c. How many years after the beginning of 2000 was Jasmine's car worth $3,400?
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Algebra.Com's Answer #741175 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "Jasmine's car was worth $\"11000\" at the beginning of \"2000\" and the value of the car decreased exponentially, decreasing by \"20\"% each year.\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "use depreciation formula:
\n" ); document.write( "\"v+=+c%281-r%29%5Et\"
\n" ); document.write( "where:
\n" ); document.write( "\"v\" = future value
\n" ); document.write( "\"c\" = current value
\n" ); document.write( "\"r\" = depreciation \"rate\" per period
\n" ); document.write( "\"t+\"= number of periods\r
\n" ); document.write( "\n" ); document.write( "a. Write a function \"f\" that determines the value of Jasmine's car (in dollars) in terms of the number of years \"t\" since the beginning of \"2000\".\r
\n" ); document.write( "\n" ); document.write( "since the beginning of \"2000\" to this year, there is \"18\"\r
\n" ); document.write( "\n" ); document.write( "\"v+=+c%281-r%29%5E18\"\r
\n" ); document.write( "\n" ); document.write( "if car was worth $\"11000\" at the beginning of \"2000\" , and the value decreasing by \"20\"%=\"0.20\" each year
\n" ); document.write( " this year is worth:\r
\n" ); document.write( "\n" ); document.write( "\"v+=+11000%281-0.20%29%5E18\"\r
\n" ); document.write( "\n" ); document.write( "\"v+=+11000%280.80%29%5E18\"\r
\n" ); document.write( "\n" ); document.write( "\"v+=+198.16\"\r
\n" ); document.write( "\n" ); document.write( "b. How many years after the beginning of \"2000\" was Jasmine's car worth $\"6000\"?\r
\n" ); document.write( "\n" ); document.write( "\"6000+=+11000%281-0.20%29%5Et\"\r
\n" ); document.write( "\n" ); document.write( "\"6000+%2F11000=%280.80%29%5Et\"\r
\n" ); document.write( "\n" ); document.write( "\"6+%2F11=%280.80%29%5Et\"\r
\n" ); document.write( "\n" ); document.write( "\"log%286+%2F11%29=log%28%280.80%29%5Et%29\"\r
\n" ); document.write( "\n" ); document.write( "\"log%280.5454545454545455%29=t%2Alog%280.80%29\"\r
\n" ); document.write( "\n" ); document.write( "\"t=log%280.5454545454545455%29%2Flog%280.80%29\"\r
\n" ); document.write( "\n" ); document.write( "\"t=2.7\" ->little over \"2\" and half years; so, it was in \"2003\"\r
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\n" ); document.write( "\n" ); document.write( "c. How many years after the beginning of \"2000\" was Jasmine's car worth $\"3400\"? \r
\n" ); document.write( "\n" ); document.write( "\"3400+=+11000%281-0.20%29%5Et\"\r
\n" ); document.write( "\n" ); document.write( "\"3400+%2F11000=%280.80%29%5Et\"\r
\n" ); document.write( "\n" ); document.write( "\"34+%2F110=%280.80%29%5Et\"\r
\n" ); document.write( "\n" ); document.write( "\"log%2817+%2F55%29=log%28%280.80%29%5Et%29\"\r
\n" ); document.write( "\n" ); document.write( "\"log%280.3090909090909091%29=t%2Alog%280.80%29\"\r
\n" ); document.write( "\n" ); document.write( "\"t=log%280.3090909090909091%29%2Flog%280.80%29\"\r
\n" ); document.write( "\n" ); document.write( "\"t=5.3\" ->little over \"5\" years and three months; so, it was in at beginning of \"2006\"\r
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