Question With Answers Below! PLZZZ HELP!!! :(

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?