1. A certain list consists of several different integers. Is the product of all the integers in the list positive? (1) The product of the greatest and smallest of the integers in the list is positive (2) There is an even number of integers in the list. I chose A for the answer, but the actual answer was C. Why B works? can't think it through. please help! 2. In the rectangular coordinate system, are the points (r,s) and (u,v) equidistant from the origin? (1) r+s=1 (2) u=1-r and v=1-s don't know how to solve this question. help! | 
