Problem 8. A concave amkeup mirror is designed so that a person 28.7 cm in front of it sees an upright image ata distance of 51.1 cm behind the mirror. What is the radius of curvature of the mirror? Answer in cm. Note: What is the radius of curvature formula? Problem 19. A convex mirror of focal length 32 cm forms an image of a soda bottle at a distance of 19 cm behind the mirror. The height of the image is 7 cm. Where is the image located? In units of cm. Note: Where do I start? Problem 23. A spherical glass ornament is 7.44 cm in diameter. An object is placed 9.62 cm away from the ornament. Where will its image form? In units of cm. Note: What formula should I use? Problem 32. A concave spherical mirror can be used to project an image onto a sheet of paper, allowing the magnified image of an ulluminated real object to be accurately traced. If you have a concave mirror with a focal length of 16 cm, where would you place a sheet of paper so that the image projected onto it is twice as far from the mirror as the object is? In units of cm. Note: I don't know where to start/ Problem 38. A convex mirror with a radius of curvature of 45.9 cm forms a 1.71 cm tall image of a pencil at a distance of 15 cm behind the mirror. What is the height of the object? In units of cm. Note: I don't know where to start!