Este 95 un numar prim?

Va rog este urgent

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

Pls the last one and it has to be like number 6