SteamBoat Problem Mark Twain sat on the deck of a river steamboat. As the paddle wheel turned, a point on the paddle blade moved so that its distance, d, from the water's surface was a sinusoidal function of time. When Twain's stopwatch read 1 seconds, the pointť was at its highest, 18 feet above the water's surface. The wheel's diameter was 20 feet, and it completed a revolution every 9.5 seconds. Draw the function and write the cosine function to model this situation.

SteamBoat Problem Mark Twain sat on the deck of a river steamboat. As the paddle wheel turned, a point on the paddle blade moved so that its distance, d, from the water's surface was a sinusoidal function of time. When Twain's stopwatch read 1 seconds, the pointť was at its highest, 18 feet above the water's surface. The wheel's diameter was 20 feet, and it completed a revolution every 9.5 seconds. Draw the function and write the cosine function to model this situation.