Answer:350,000Step-by-step explanation:Identify the ten-thousands place → 4 in 349,128 (digit position: 3 4 9,128).Look at the digit to its right (thousands place) → 9.Since 9 ≥ 5, we round up the ten-thousands digit from 4 → 5.Change all digits to the right of the ten-thousands place to 0.✅ Final answer: 350,000