Step-by-step explanation:
- Light reflects from a smooth surface at the same angle as it hits the surface. For a smooth surface, reflected light rays travel in the same direction. This is called specular reflection. For a rough surface, reflected light rays scatter in all directions.
Its easy you just have to do the pi formula
Answer:
the answer would be D. 20 because u plug 3 in for x so F(x)= 9+9+2
Step-by-step explanation:
