 Wysłany: Pon 2:30, 18 Paź 2010 Temat postu: 1 + 0.075/4 |
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So it will take about 7.14 years. Answer by θ βяιαη θ Recall your compound interest formula. We said: Add your own answer in the comments! Since the rate is 7.5%/year,football jerseys, we have that r = 0.075. Also, we are compounding 4 times a year. So we have that n = 4. We are also given that A = 8500 and P = 5000. So we have: 8500 = 5000(1 + 0.075/4)^(4t) ==> 8500 = 5000(1.01875)^(4t) ==> 1.7 = 1.01875^(4t) ==> ln(1.7) = ln[1.01875^(4t)] ==> ln(1.7) * 4t*ln(1.01875) ==> 4t = ln(1.7)/ln(1.01875) ==> t = ln(1.7)/[4ln(1.01875)] ≈ 7.14 Forever Yours asked the following: Find the time required for an investment of 5000 dollars to grow to 8500 dollars at an interest rate of 7.5 pe? Find the time required for an investment of 5000 dollars to grow to 8500 dollars at an interest rate of 7.5 percent per year,football jerseys, compounded quarterly. Bookmark at: I hope this helps! A = P(1 + r/n)^(nt) |
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