To round a number, we first have to find the column in question. In this question, we need the thousands column, which has a 9 in it. Next, we go to the column immediately to the right. If the number is 4 or less, we don't add one to the thousands column and set all the numbers to the right to zero. If the number is 5 or more, we add one to the thousands column and set all the numbers to the right to zero.
In this case, the number in the column immediately to the right is a 0, so we don't have to add 1 to the thousands column, and rounded to the nearest thousand, we get 39,000.
Good luck,
Paul
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