Results on this exam were very disappointing.
70 scores were below 60%.
It's crucial that you evaluate what's going wrong and work to fix it. Spending
sufficient time working on problems seems like the most likely cause.
On the positive side, there are 320 points still to go, so catching up to the grade you really want is quite possible -- providing you can figure out how to improve on what happened on this exam.
We'll go over the material in class. But you should be able to find problems that resembled those on the exam in the homework, practice, quizzes, or sample exam.