(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I can't seem to figure out whether I'm dealing with a + or - radius value. Anyways here's the question:

An object 5.0 cm tall produces an image that is 7.0 cm behind the mirror. If the radius of the curvature of this mirror is 10.0 cm, what is the magnification of the object? What kind of mirror is used?

2. Relevant equations

3. The attempt at a solution

I'm guessing it is either a virtual erected concave larger image or virtual erected convex smaller image. How can I solve for M in a question like this to find whether it's larger or smaller :S?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Curved mirror identification & magnification question

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