1) A virtual image is located 43.5cm behind a concave mirror with focal length 15.0 cm
A) Where is the distance from the mirror to the object?
B) By how much is the image magnified?
2) A lightbulb is 48 cm from a convex lens, and its image appears on a screen located 31 cm on the other side of the lens.
A) What is the focal length of the lens?
B) By how much is the image enlarged or reduced?