The answer will be 261.8 because the tenths are the 1st digits after the decimal points which rounds up the 9s to the the 80 but you don’t have to include the zero on the final answer
Ridge push is a process in which the unlifted ridge is thought to push the oceanic plate towards the subduction zone. Slab pull is a process where by the weight of a subducting plate help to pull the trailing lithosphere into subduction zone. Ridge lush is cause by the potential energy gradient from the high topography. Slab pull is caused by negative buoyancy of the subducting plate.