If Emily rounded to the nearest hundred and estimated 700 rubber ducks in the race, the actual count could be any number in the range of 650 to 749.
If Emily rounded the number of rubber ducks in a race to the nearest hundred and she says there are about 700 rubber ducks, this means the actual number of rubber ducks could be any number that would round to 700 when applying standard rounding rules.
To round to the nearest hundred, any number from 650 to 749 would round up or down to 700.
Therefore, a few examples of the number of rubber ducks that could be entered in the race include 680, 721, or 745 rubber ducks, among others within that range.