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ian invested $8000 part at 9% per anum and the remainder was at 10% per anum. after one year
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John invested $2500, part at 8% and the rest at 12% per annum. The two parts earned equal amount of interest in one year. How much was invested at each rate?
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how long will it take to earn $568.75 in interest if $2500 is invested at a 6.5% annual interest rate
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