The error interval question is wrong isn't it... the value 8.3 was on a student's calculator display and as far as i know calculators don't round so it can't be 8.25? The answer i got was that it was bigger than or equal to 8.3 and smaller than 8.4
I am so sorry but i think this has some errors.. First that containor was aleeady full of water you had to calculate the amount of cups to fill what was left.