If f(x)= x+5/x-1 and g(x)= x-3, which function has the same domain as (f°g)(x)?

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? 0.62 0.78 0.84 0.96