Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:.

with such great emphasis put on the act and sat exams—the studying, the review sessions, taking the test, retaking the test, scholarships dependent on scores, etc.—many think the scores are the be all end all of college applications. if you have a high score, you can get into any college you want. if you have a low score, you’re doomed.