http://www.flickr.com/photos/101040410@N07/12280135435/ The question and answer

Question

http://www.flickr.com/photos/101040410@N07/12280135435/

The question and answer choices are in the link above, I know you must use these formulas but not sure how to proceed.

angular frequency: omega w = 2pi*f = 2pi/T
wave number k: k = 2pi/lambda
to find the analogous relationship between w and k: v = lambda*f = w/k

I am not sure how to plug in the numbers from the equations to the formulas. Please let me know which equation you used and with the numbers plugged in so I can see where exactly you got it from so I can follow along. Thanks !

Explanation / Answer

y= 3.7cos(2.2x-5.6t)

speed =w/k = 5.6/2.2 = 2.5454 m/.s

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