Math

CalculusQ&A LibraryThe depth (in feet) of water at a dock changes with the rise and fall of tides. The depth is modeled by the function D(t) = 2 cos + 4 -t + 4 where t is the number of hours after midnight. Find the rate at which the depth is changing at 4 a.m. Round your answer to 4 decimal places. Preview TIP Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Enter DNE for Does Not Exist, oo for InfinityStart your trial now! First week only $4.99!*arrow_forward*

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I will appreciate detailed explanation with short comments, so I can do similar exercises.

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