Margaret has some goats. the goats produce an average of 21.7litres of milk a day for 280 days. she sells the milk in half litre bottles. work out an estimate for the number of bottles margaret will be able to fill with the milk.

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?