Use distance formula to find AB, Bc, Dc, and DE

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added