Subtract 7 from 9. You get 2. It is the "extra". The answer, therefore is 1 2/7
Answer:6
Step-by-step explanation:
Answer:
Maxima and minima are+ 4,-4; 2.67,-3; 2.2, -2.6, respectively.
The first and most noticeable wavelengths are 2 m and around 15 m however the 3-and 5-point filters gradually decrease the amplitude of the 2-m wave-length.
I believe the answer is 23 :)