Section 3.6.P1: The Chain Rule Part 1 Score: 10/11 10/11 answered 0 Question 1 1 v The depth (in feet) of water at a dock changes with the rise and fall of tides. The depth is modeled by the function _ 1r 31r D(t) : 5311:1(Zt + T) + 2 where t is the number of hours after midnight. Find the rate at which the depth is changing at 4 am. Round your answer to 4 decimal places. | ft/hr