Please answer the question in the photo, thank you!

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Find the cosine function that is represented in the graph.