A Mister X invested $35000 in a local developing business at an interest rate of 7.5% for 2 years. The rate could be increased to 8.25% after 18 months in case the investor would expend time of his investment to 48 months. Find the total amount which can be earned by this investor after 4 years.

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investment 35000 75 for 18 months ... View the full answer