Asystem consists of two components, each of which must activate if the system is to activate. one component has a reliability of .99. the other has a reliability of .95. the components are independent of one another with respect to reliability. what is the overall system reliability?

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.