Which of the following would be equivalent to 11 to the 8th power over 11 to the 3rd power?

a)11 to the 7th power over 11 to the 7th power
b)11 ⋅ 114
c)11 to the 0 power over 11 to the 5th power
d)110

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?