3800
3,800 is already rounded to the nearest tens place. When looking at where the tens place would be (the first zero), you can see it is already zeroed out. It looks like this number was already rounded to the nearest hundreds place.
3800
Nearest ten: 3750Nearest hundred: 3700.
3800
3800
3800
3800
3800
3800
60
It is then 740 when rounded to the nearest ten.
30
36,184 rounded to the nearest ten thousands place is 40,000.