1. An airplane takes off and flies 225 km on a course of 25.0° north of west and then changes direction and flies 135 km due north where it lands. Find the displacement from its starting point to its landing point.
2. A ship travels 50.0 mi on a course of 15.0° south of east and then travels 85.5 mi on a course of 60.0° west of south. Find the displacement from its starting point to its ending point.
3. A ship travels 135 km from port on a course of 25.0° south of east to an island. It then travels 122 km on a course of 35.5° west of south to a second island. Then it travels 135 km on a course of 10.4° north of west to a third island. Find the displacement from its starting point to its ending point.
4. A ship travels 145 km from port on a course of 65.0° north of east to an island. It then travels 112 km on a course of 30.5° west of north to a second island. Then it travels 182 km on a course of 10.4° west of south to a third island. Then it travels 42.5 km due south to a fourth island. Find the displacement from its starting point to its ending point.