posted by ashley -- .
A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror. If you measure distance from the optic center of the mirror,
(A) What is the focal length of the mirror?
(B) What is the position of the object?
(C) What is the magnification of the image?
(D) What is the height of the image?