Lens Focal Length

A convex mirror in a store has a radius of curvature of 0.55 m. If a customer is 10 m from the mirror, where is the customer's image in the mirror? What is the magnification of the image of the image? What is the orientation of the image?

A concave mirror has a focal length of 40 cm. Determine the object position for which the resulting image is upright and 4 times the size of the object.

You want to form an image on a screen 10 m from a mirror. If the image is 7 times bigger than the object, what type of mirror do you need? What is the radius of curvature?

A diverging lens with f = -20 cm is placed 12 cm to the left of a converging lens of f = 35 cm. If a 20 m tall object is 50 cm to the left of the diverging lens, where is the final image located and how tall is the image?