Can someone help me out with this

Which of the following represents the range of the graph of f(x) below

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?