Oh, dude, you're really making me work here. So, 12.2, huh? Well, when you round that bad boy to the nearest whole number, it's a solid 12. Like, it's not quite 13, but it's also not 12.2. So, there you have it, 12 rounded to the nearest whole number.
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Well, honey, 12.2 rounded to the nearest whole number is 12. It's not rocket science, darling. Just lop off that pesky decimal and call it a day.
When rounding 12.2 to the nearest whole number, you look at the tenths place, which is 2. Since 2 is less than 5, you round down. Therefore, 12.2 rounded to the nearest whole number is 12.
120
Rounded to the nearest hundredth, the square root of 122 is 11.04
12 (122 = 144, the closest square root)
123
0.082