A hatchling turtle has a shell with a 1-inch diameter. The shell keeps a similar shape as the turtle grows. Compare the volume in surface area of the hatchlings shell to the shell when its diameter is 4 inches

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?