How could you keep outside noise out of a room? What supplies would you need and why would those be helpful?

Give an example of the type and scale of economic activity for a traditional economy.

Which statement best describes gravity? it is the force that repels only very small objects. it is the force that acts between objects with zero mass. it is the force that sometimes acts only on very large objects. it is the force that acts between any two objects in the universe.

How do you work out 21.3-8= show your working. plz