1. The problem statement, all variables and given/known data "An object is 4.0 cm in front of a concave mirror having a 12.0-cm radius. Locate the image using the mirror equation and a ray diagram." 2. Relevant equations 1/f = 1/do + 1/di where f = Focal Length, do = Distance Object, di = Distance Image m = hi/ho = -di/do where m = Magnification, hi = Height of Image, ho = Height of Object 3. The attempt at a solution f = 6 cm do = 4.0 cm Ho = ? di = -12 Hi = ? C = 12 I got 1/6 = 1/di + 1/4 1/6 - 1/4 = 1/di Which equaled -12 Hi/Ho = -(-12)/4 Usually I knew Hi or Ho to get the answer but I don't know it this time! Can anyone help me with this seemingly easy problem?