It certainly pays to check your work! I just took a HUGE science test. I
checked it over twice before I turned it in, and I got an A! My score was 94
out of 100! I figure that each time I checked it, I found half of the mistakes
that were there at the time.
What would my score have been if I had not checked my work?
What would my score have been if I had checked it a third time?