concave mirror!!! 1. The problem statement, all variables and given/known data The real image produced by a concave mirror is found to be 0.756 times the size of the object. If the distance from the mirror to the screen on which the image appears is 0.764 m , what is the focal length of the mirror? 2. Relevant equations (a) 1 /do + 1/di = 1/f (b) image height / object height=m = - di/do (c) - object height / image height = do / di 3. The attempt at a solution m= 0.756 = -hi / ho so to use equation "c" i inverted --- > -1/0.756 then set it euqal to rest of the equation so --> -1/.756 = do / .764 do= -1.01058 m then i used equation "a" (1/-1.01058) + (1/.764) = 1/f and solved for f Answer was Wrong. Please tell me what I need to do. Thank you!