Question 1117094
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This sounded like it might be an interesting problem, so I spent way too much time trying to figure out what the given information really was.  Unfortunately, with the misspellings, bad punctuation, and the use of some words that don't make any sense at all, I was unable to glean enough information to have a chance of solving the problem.<br>
There is enough information about beginning population, minimum and maximum populations, and period length to find a sine or cosine function for the bird population.<br>
But I found no useful information for finding a function for the shellfish population.<br>
If the two populations can be represented by sine or cosine graphs, then all the given information about the risk to the shellfish population is irrelevant; and that leaves no information at all about the shellfish population.<br>
It's really a shame that you were unable to present the problem in a way that it could be solved.