Help please!! I'm very confused

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

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?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)