you mix 0.6L of a 0.2% v/v concentration of drug E with 1.2L of a 0.5% v/v concentration of drug E. what will the final % concentration be?

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.