740
6
1140
It ends in 8, so it is rounded up to 740.
700
You round to the nearest tens place. In this case, 738 rounded to one significant figure is 700.
60
It is then 740 when rounded to the nearest ten.
30
36,184 rounded to the nearest ten thousands place is 40,000.
2602 rounded to the nearest ten is 2600.
320
20
260