document.write( "Question 1026119: Choose and exponential function that represents a real-world situation and graph the function. Analyze the graph. \n" ); document.write( "

Algebra.Com's Answer #641422 by rothauserc(4718) $\"\"$ $\"About$

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The following exponential function is used to calculate the amount of money after a certain time
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\n" ); document.write( "A = P(1 + r/n)^tn, where A is the amount, P is the principle, r is the rate, n is the number of times the interest is compounded in a year, t is the number of years
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\n" ); document.write( "Suppose we want to answer the following question
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\n" ); document.write( "How much money should be invested at 5% compounded quarterly for 20 years so that you have $20000 at the end of the 20 years?
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\n" ); document.write( "20000 = P(1 + 0.05/4)^(20*4)
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\n" ); document.write( "20000 = P(2.701484941)
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\n" ); document.write( "P = 20000 / 2.701484941 = 7403.335735206
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\n" ); document.write( "We need to invest $7403.34
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