it is 3
look at the first number after the decimal point. If less than 5 then it rounds down (to 3 in this case). If 5 or greater it rounds up to 4
6465000
0
No it is not a square number. It's square root is 18.57 rounded.
345 is a whole number already so just write that.
345 will round to 350.
345 rounded to the nearest 10 is 350
340
To the nearest whole number it is 345
345 rounds to zero.
6465000
345 rounded to the nearest tenth is 345. There is no change.
0
300
Take your choice out of: 345, 346, 347, 348 and 349
340
300
5520