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