Liz had attended class everyday since she started school as a kindergartener. she said she had been in school for about a thousand days what could the actual number of school days be if she rounded to the nearest ten?

This would mean that she has been in school for about 1,000 days. Thus, we need to figure out the amount of days she would have went to school within the week. This would normally be 5 days within the 7. 

5/100 x 1000 is 714.28

When rounded to the nearest ten, it would end up at 710.