If 1/1 or 2/2 =1 and if 0/1 ir 0/2 =0 as well as if 1/0 or 2/0 = infinity then what will be value of 0/0? Answer with reason​

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?