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\f1B. [-11 Points] DSCALCl 3.6.259. The depth (in feet) of water at a dock changes with the rise and fall of tides. The depth is modeled by the function 0(t), where t is the number of hours after midnight. om : 2 sin(t 71) + 7 5 5 Find the rate [in ft/hr) at which the depth is changing at 6 a.rn. (Round your answer to one decimal place.) SW 19. [217 Points] PREVIOUS ANSWERS OSEALC'I 3.6.901 .WA.TUT.SA. This question has several parts that must be completed sequentially. If you skip a liJai't of the question, you Will not receive any points for the skipped part, and you will notbe able to come back to the skipped part. Tutorial Exe Compute the derivative of (f0 9). u) : Su + 1, g(x) : 5in(9x). Click here 10 beg 20. [-118 Points] OSCALC1 3.6.902.WA.TUT.SA. This question has several parts that must be completed sequentially. If you skip a lijai't of the question, you Will not receive any points for the skipped part, and you will notbe able to come back to the skipped part. Tutorial Exe Calculate the second derivative of the function. rm) : 59:2(36) Slep 1 ul E Recall the chain rule for differentiating y : u" where u : g(x). y: i For the given function, let u : sec[3'). Find 2. d8 1\" : sec[39j( )i( ) .15 0'9 3 sec[36)