PLEASE HELP: I need to find the domain and range of each function.

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 g(x) = x+1/ x-2 and h (x) =4 - x , what is the value of ( g*h) (-3)?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m