The distance and time that Amiliya runs each day depends ont a number of h urs, h, that she works. The distance, D, in miles, and time, T, in minutes, that she runs are iven by the fur ctions D(h) = -0.5h-9.5
and T(h) = -5.5h + 92.5 respectively.
Let R be the average speed that Amiliya runs on a day in which he works h hours.