score = Max_Score * Percentage_Score * (0.90)^(days_late).
A day is a 24 hour period, rounded up to the nearest day.
For example:
You turn your project in 3 days late, and received a 95% score based on the work done. Your recorded score will be:
score = 100 * (0.95) * (0.90)^3
score = 100 * (0.95) * (0.729)
score = 69