Aplane directly above denver, colorado, (altitude 1650 meters) flies to bismark, north dakota (altitude 550 meters). it travels at 700 km/hour at a constant height of 8250 meters above the line joining denver and bismark. bismark is about 850 km in the direction 60∘ north of east from denver. find parametric equations describing the plane's motion. assume the origin is at sea level beneath denver, that the x-axis points east and the y-axis points north, and that the earth is flat. measure distances in kilometers and time in hours.