Question
Pierre has 4 coins in his purse. They are either fifty-cent coins or ten-cent coins. What is the smallest possible amount of money in his purse when he has one or more ten-cent coins? Express your answer in dollars.
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Pierre has 4 coins in his purse. They are either fifty-cent coins or ten-cent coins. What is the smallest possible amount of money in his purse when he has one or more ten-cent coins? Express your answer in dollars.