What is the significance of extrapolating a graph for stability of a floating body​

Can you think of a way a rock unit with an older fossil could be above a rock until with a younger fossil? describe the scenario.

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.