6,289,002 rounded to the nearest 1,000,000 is 6,000,000. This is because the number in the hundred thousands column, the one to the right of the first digit, is less than five, so it gets rounded down.
It is 6810 rounded to the nearest ten
14.20
The answer is zero.
9000
20
10.4
The number 65.76 is already rounded to the nearest hundredth.
120.0
410
200
7100
379.94