Answer: Y = 3.529 * sin {H.499}: 1.6?4) + 6.322 Using any other points would change the equation slightly. The maximum would be the same. as would the amplitude. What could change due to us would be fre uen . A large trawler needs 4 m of water to float. For approximately how many ho the boat sit on the floor of the basin? [1] Answer: The boat will sit on the floor of the basin for 4 hours of the day What is the water depth at 14:35? Note: 1?:12 is 1? h D of an h [| 1?.2 12 Ed [2] Answer: The water depth at 14:36 is 4.43m