Find cos(A+B), given sinA=35 and cosB=−12/13 and both A and B are in π2<θ<π

What is a graph with a never ending line called?

Average acceleration: i have no idea how to do this.

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?