An airplane is flying at a speed of 250 mi/h at an altitude of one mile and passes directly over a radar station at time t = 0. (a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. d(t) X (b) Express the distance s between the plane and the radar station as a function of d. s(d) = (c) Use composition to express s as a function of t. (s o d) (t) =