Answer:
1724.9
Explanation:
1724.89 ≈ 1724.9
If you want to round to tenths place, look at hundredths place.
If the digit in hundredths place is 5 or more than 5 (5,6,7,8,9), then add '1' to the tenth place.
Here, 9 is in hundredths place, so add 1 to 8
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