You have all the info needed to solve this problem, you're just not putting things together. The fact that the image is upright means that the linear magnification is positive: in this case m = +4. Now use the definition of m to write the object distance (p) in terms of the image distance (q). Then when you plug into the mirror equation, you can solve for p.Aerospace said:haha...i already knew those formulas.
but what's stumping me is...i only know f and the magnitude -.-
is there something that i'm not seeing? i can be totally blind sometimes!