hey i did standard maths today and for one of the question we had to find the BAC and then using another formula had to sub it in to find the time for BAC to reach 0.

when doing the BAC i got an answer of 0.088....

and i rounded it to 0.09 (the question did not specify and usually BAC is to two decimal places).

i then subbed it into the other formula and got an answer of six.

However if i used 0.088 i would have gotten 5h 52minutes.

so 8 minutes is quite the difference.

how would they mark this. I have been reading the discussion group and people have been rounding to all sort of decimal places 4, 2, 3 or using the answer function on the calculator- With all of these options giving slightly different answers.

Would I be deducted marks for rounding to 0.09, technically I didn't do anything wrong since BAC is always to 2 and question did not say. The question was 4 marks I believe. Also if I were to get deducted how many? just one?