The faster you buzz your lips when playing a brass
instrument, the the sound.
A lower
B longer
slower
D higher

D higher

Step-by-step explanation:

The pitch of a brass instrument depends on the volume of air that is vibrating, as well as the speed at which the player's lips are vibrating.

By buzzing the lips faster or slower, the player can cause the air in the tube to resonate at different harmonics.

Hope this helps! :)

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e