Today, Darren has ECON 301 exam in the morning and sociology exam in the evening. Yesterday night, Darren had time to ready 40 pages of economics and 30 pages of sociology. Alternatively, he had time to read 10 pages of economics and 90 pages of sociology. Which of these equation describes all combination of pages of economics, E, and sociology, S, that he could read?

a) E/2 + S = 50

b) E + S = 100

c) E + S =70

d) 2E + S = 110

e) All of the above

An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 120 lb and 161 lb. the new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 28.1 lb. a)if a pilot is randomly selected, find the probability that his weight is between 120 lb and 161 lb. the probability is approximately? b. if 36 different pilots are randomly selected, find the probability that their mean weight is between 120 lb and 161 lb. the probability is approximately? c. when redesigning the ejection seat, which probability is more relevant? . part (b) because the seat performance for a single pilot is more important. b. part (b) because the seat performance for a sample of pilots is more important. c. part (a) because the seat performance for a sample of pilots is more important. d. part (a) because the seat performance for a single pilot is more important.