How can you fix coal mining rhat causes pollution?

In which type of economy do the forces of supply and demand typically drive prices? a. a market economy b. a traditional economy a planned economy d. a command economy select the best answer from the choices provided. 0 0 em oo 0 0

Does anyone know the answers for these

8. is a technique that uses the images from several telescopes to produce a single image. a. reflection b. interferometry c. radiation d. refraction