An object 1.95 cm high is placed 11.2 cm in front of a convex mirror with a radius of curvature of 9.8 cm. Where is the image formed?? So i know Di= (Doxf)/(Do+f).....(11.2 x 9.8)/ (11.2 + 9.8) = 5.23 cm However, the correct answer is 3.41 cm What am i doing wrong here? I know that the 9.8 may not be the focal length but how do i relate the height to the focal length??