Answer:
5,000
Explanation:
THOUSANDS PLACE: 5 (5,000)
HUNDREDS PLACE: 0
TENS PLACE: 4 (43)
ONES PLACE: 3
So we have no round to the nearest thousand. So go to 5 and look at 0. 0 is below 5 that means 5 will remain as 5, but the numbers on the right is 0. Therefore the answer is 5,000.