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.?

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anonymous · Answer

@phi @Hero @myininaya @whpalmer4 Could someone please help me through this? It's the last question I have, then I'm done for the night. :/ I'd appreciate it tons.