A jeep is traveling in a straight line across a flat, empty dessert. On a navigational map with a unit representing 1 km, the starting point of the jeep is at (-140, -70) and its destination is at (280,50). There is a refueling depot with an emergency transmitter half way along the route. During the journey, the jeep shows signs that engine trouble will soon develope. The driver must decide whether to turn back to the start, or try for the refueling depot, or continue to the end of the trip. If the jeep travels at 30km/h what should the driver do in each of the follwing situations. Explain.
A)the signs of engine trouble devlop after 4 hours
B) The signs of engine trouble develop after 11 hours
please help!!