In general, if you want to revise and resubmit any assignment within a week
after it was due, I will regrade it (eventually–perhaps not immediately),
and average the new grade with the old. So if you get an 85=B at first,
resubmit and get a 95=A, then I will record the grade of 90=A-.
However, the maximum achievable grade upon
resubmission is a low-A, in my numerical scheme, 92.5. In other words, it
will not pay to resubmit an A-! I think this is appropriate.