Quick I'll Mark it Brainliest Which of the following statements is true? A. Burning air and gasoline in an engine changes chemical energy into mechanical energy. B. Friction causes molecules to vibrate more slowly. C. It is impossible to change mechanical energy into mechanical energy. D. Most heat energy is easily recovered and used for useful actions.

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)