Let's say Luke inherited $9,000 dollars from an uncle when he was 10 years old and it was deposited in a stock market fund at that time. The account was turned over to him when he was 29 years old. Assume that the stock market fund increases an average of 5% a year. 

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If, when Luke turns 29, he decides to leave the money in the account to save for a down payment on a house, how old will he be when he has $35,000 in the account?