A girl delivering newspapers covers her route by travelling 3.00 blocks west,4.00 blocks north, and then 6.00 blocks east. a) what is her resultant displacement?
b) what is the total distance she travels?

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.