1. keth and Rylan are driving in their car in the school parking lot. While they are driving Addy decides to play his clarinet out of the window of the car. A student they are driving away from at a speed of 8.5 m/s hears a frequency of 640 Hz. (The Speed of sound is 341 m/s) 

 

1.  What was the frequency of the note played on the clarinet? 

 

1. How fast would they have to drive away from the student so that they hear a frequency of 600 Hz?