9000.0499...
4592 rounds to 4592 if you round to the nearest tenth, as tenth relates to decimal figures which aren't included in the number you gave.However, 4592 rounds to 4590 if you round to the nearest ten.
15.5
0.11 rounds to:0 to the nearest whole number/unit0.1 to the nearest tenth
0.85 rounds to:1 to the nearest whole number/unit0.9 to the nearest tenth
0.18 rounds to:0 to the nearest whole number/unit0.2 to the nearest tenth
0.80 rounds to:1 to the nearest whole number/unit0.8 to the nearest tenth
8.13 rounds to:10 to the nearest ten8 to the nearest whole number/unit8.1 to the nearest tenth
20.50 rounds to20 to the nearest ten21 to the nearest whole number/unit20.5 to the nearest tenth
8.50 rounds to10 to the nearest ten9 to the nearest whole number/unit8.5 to the nearest tenth
3.62 rounds to0 to the nearest ten4 to the nearest whole number/unit3.6 to the nearest tenth
25.78 rounds to30 to the nearest ten26 to the nearest whole number/unit25.8 to the nearest tenth
8.33 rounds to:10 to the nearest ten8 to the nearest whole number/unit8.3 to the nearest tenth