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Mary needs $9000 in 7 years. What amount can she deposit at the end of each quarter at 6% interest compounded quarterly so she will have her $9000?
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Again, that all makes sense. Thank you very much. Thank you very much. I did get the derivative you show, but then divided through by 6 to get at the stationary points. Was that wrong? I'm only looking for a critique please, not
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