7.5 Since zero is next to 5 and to round it has to be greater than 4 and so all the other numbers will go and 5 will stay the same Because 0 is less than 4 and if it was greater then four then 5 would be 6
7.5, because: Ex: .1, 1 is in the tenths place because it is right after the decimal. The digit after 5 is 0, and that rounds down. 0-4 round down, and 5-9 round up. So, 0 would keep 5 as itself.
