How to express 7.5 million in expanded notation?

Give three differences between oceanic and continental crust brainliest will be awarded

What are the answers to numbers 7,10,12

This image shows a volcanic eruption in hawaii with lava flowing into the sea. which statements best describe this eruption? check all that apply. its magma is high in silica. its magma has low viscosity. its lava came from a quiet eruption. its lava sets fire to everything in its path. its lava came from an explosive eruption.