Feeling lonely need someone to text only hangouts

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Which of the following is an example of motion in two dimensions?

True or false graphs must include scales that increase by the same amount