1. The problem statement, all variables and given/known data Suppose the radius of curvature of a concave mirror is 5.0 cm a) Find the object distance that gives an upright image with a magnification of +1.51. 2. Relevant equations 1/Do + 1/Di= 1/f m=-di/do=hi/ho 3. The attempt at a solution First i convered all cm into m. f=R/2, so .05/2 = .025. 1/.025=40 then I used m=-Di/Do. Since don't know Do or Di, I substituted for the unknowns using 1/Do + 1/Di= 1/f I came up with... m=-[40-(1/Do)]/[40-1/(40-1/Do)] and solved for Do. I got Do=.02506m. Online HW says it's wrong. Any help is GREATLY appreciated. What I did makes sense to me but obviously there's an error or just some major concept I don't understand. Thank you so much for taking the time!