The weight of 120 books is 36kg, find the weight per book

Write a recursive sequence that represents the sequence defined by the following explicit formula:

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year