explanation

2. What average life should the sensors with life behavior offer to be economically competitive against the originals? A manufacturer of a laser company reports that the average number of pages that a cartridge prints before replacing it is 12200 the distribution of printed pages per cartridge approximates the normal probability distribution and the standard deviation is 820 pages, the manufacturer wants to provide guidance to potential customers on how long they should expect a cartridge to last a) How many pages should the manufacturer indicate per cartridge, if you want to obtain 99% certainty at all times? b) After how many hours of operation should the cartridges be changed if a reliability of 60% is to be ensured? c) Another manufacturer offers to print the pages with an average life of 12,200 pages but that follow an exponential type life behavior, which would be in