The water level varies from 12 inches at low tide to 52 inches at high tide. Low tide occurs at 9:15 a.m. and high tide occurs at 3:30 p.m. What is a cosine function that models the variation in inches above and below the water level as a function of time in hours since 9:15 a.m.
I have the first part of it, I just need helping finding the last bit of the function. So far I have 44 + 32 cos ______

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I don't think the 44 and 32 are right.

Wait...20 is midline actually I think

20 is amplitude

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