Use those coordinates (x,y) x negative left side of coodinate plane y negative down side of the coordinate plane positive x is right side and positive y is up
Answer:
4.5
Step-by-step explanation:
I can't really see the top numbers...
4.1 I think
I just subtracted in my head
We know λ = v / f where
λ=wavelength
v=velocity
f=frequency
λ = 200 / 900
λ = 2/9 meters
