The 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 T t+ + 5 3 %3D where t is the number of hours after midnight. Find the rate at which the depth is changing at 6 a.m. Round your answer to 4 decimal places. ft/hr

College Algebra
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Chapter3: Polynomial Functions
Section3.5: Mathematical Modeling And Variation
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The 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
t+
+ 5
where t is the number of hours after midnight. Find the rate at which the depth is changing at 6 a.m.
Round your answer to 4 decimal places.
ft/hr
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Transcribed Image Text:The 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 t+ + 5 where t is the number of hours after midnight. Find the rate at which the depth is changing at 6 a.m. Round your answer to 4 decimal places. ft/hr Submit Question
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