A cafeteria with 40 tables can sit 600 people. some tables can sit 10 people and some can sit 20 people. what is the ratio of the number of 10 person tables to the number of 20 person tables?

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.