A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below from earth’s surface. What has the sound wave most likely encountered

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

v=ir = 3x15 =45 v

your answer is, orbit around the nucleus