Will mark brainliest pls due tomorrow 9/27/18

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

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.