29849 (3 sig. Fig)

3 sig fig means 3 significant figures. This means that only the first 3 digits in a number are above 0.

The first 3 digits in 29849 are 298 and, because 4 is less than 5, the 8 is not round up, and remains the same. The 4 and the 9, however, become 0.

The answer is 29800