The graph shows the speed of a particle over a 10 second time interval

Renita analyzed two dot plots showing the snowfall during the winter months for city a and for city b. she found that the median snowfall is 5 inches less in city a than in city b. the mean snowfall is about 2 inches less in city a than in city b. which explains why there is a difference in the measures of center for the sets of data?

Someone me i need with this stuff

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