Me! in advance trying to raise my grade

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)

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?