2300.00...1 to the nearest 4600
4500
4600
4600
4600
The smallest whole number that can be rounded to 500 is 450.
85,500 is the lowest number that can be rounded to 86,000. 85,499 would round down to 85,000
4500, rounded to the nearest 200 would be 4600.
4600
4600
4600
4600
The answer will depend on the degree to which the number is rounded. Without any indication of that, it is not possible to answer the question sensibly.
145 is the least number that can be rounded to 150.
4600
4,600 to the nearest hundred place is just 4,600. This is because it is already rounded out. The "6" in the number is followed by two 0s.
4600
4600
The least number is 4550; the greatest is 4650 and I have no idea what a phone number has to do with any of this.