Factor the polynomial. 54c 3d 4 + 9c 4d 2 a. 9c 3d 2(d 2 + 6c) b. 9c 3d 2(6d 2 + c) c. 9c 4d 2(d 2 + 6) d. 9c 4d 2(6d 2 + 1)

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?