It all depends on your grade level. For sophomores, I would assume that it is an average score ( I am a sophomore myself, but I received a 1270). For juniors, this is below average. Your schools curriculum comes into play as well. So in short, yes or sophomores and no for juniors.
The answer is 2.25 hours, or 2 hours and 25 minutes.
9.50-5=4.50
4.50/2=2.25