Question

Can someone help me here and check out the other two i have posted there both due soon and i have no clue how to do them

Answer 1

Since the question doesn't mention in what tide the answer should be, I will be giving a solution to both, the high and low tide. Hope this helps :)

Explanation:

Using a cosine function, where time is measured in hours past high

tide: y=4cos30x + 10

Using a cosine function, where time is measured in hours past low

tide: y = 4cos[30(x-6)]+10