390
950
2941
995 to the nearest tens is 1000. When rounding to the nearest tens, you look at the digit in the ones place. If it is 5 or greater, you round up; if it is less than 5, you round down. In this case, the digit in the tens place is 9, which is 5 or greater, so you round up to the nearest tens, which is 1000.
565
93 to the nearest tens = 90
390
907.457 rounded off to nearest tens place is 910. If it were asked to round off to nearest "tenths" place, it would have been 907.5.
1.145 rounded to the nearest tens is zero. To the nearest tenths it is 1.1
950
It is: 90
It is: 150
150
2941
It is: 450
It is: 290
It is: 50