Please answer for me way to hard for me its pre algera

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?

Which graph of a hyperbola represents the equation 16x^2-y^2=16

David pays a 20% income tax on his $2,100 salary. how many dollars is the tax? show work