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depth ,h m, of the water in a port t hours after noon is given by h=1.2cos(0.16t) 5 , i)a boat with a draught of 4.2 m arrived at noon. Can the boat leave the port safely 4 hours later? ii) suppose the boat had left the port safely. Suggest a range of time in hours and minutes for the boat to re-enter the port safely in the next 18 hoursdepth ,h m, of the water in a port t hours after noon is given by h=1.2cos(0.16t) 5 , i)a boat with a draught of 4.2 m arrived at noon. Can the boat leave the port safely 4 hours later? ii) suppose the boat had left the port safely. Suggest a range of time in hours and minutes for the boat to re-enter the port safely in the next 18 hours