The answer will depend on the units used for 343200. Are they days, hours, minutes, seconds, milliseconds, microseconds? Since you have not bothered to provide that information, I cannot provide a sensible answer.
1560
987 rounded to the nearest 100 is 1000.
2.7
988
20.78
4,651 rounded to the nearsest thousands is 5,000
2400
7.6
13.49
0.1
It is 958
1560
117 rounded to the nearest 100 = 100
987 rounded to the nearest 100 is 1000.
303 to the nearest 10 = 300
The correct answer is zero when rounding 106 to the nearest thousand.
It is 30 because .5 rounds up to 1