What is 0.68 inits simplist fraction form

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)

Restrictions on f(x) = 1/x+5 and g(x) = x-2

When turned about its axis of rotation, which shape could have created this three-dimensional object?