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When Grace was born in 2007, her parents deposited $10000 into an investment account with an annual interest rate of 5%, compounded quarterly.
Calculate the amount of money in her account when she turns 18.
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Once she turns 18, Grace begins depositing $400 into the same account at the end of each month.
Determine the first year in which Grace will have more than $200000 in her account.
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