Finding image height for object in front of plane mirror

[re496210]

An object which is 0.54m tall is located 1.23m in front of a plane mirror.
How tall is the image as seen in the mirror?

I know that the image seems to be 1.23m from the surface of the mirror and that the object seems to be 2.460m from the image.

What equation do I need to use to figure out how tall the image is in the mirror.

 

[tiny-tim]

hi re496210!

An object which is 0.54m tall is located 1.23m in front of a plane mirror.
…
What equation do I need to use to figure out how tall the image is in the mirror.

common-sense?

(or just look in a mirror)

 

[re496210]

Thanks! I thought that that was the correct answer, but every time I entered .54m into the homework, the system told me that I need more digits. I tried 0.540m and that finally worked for me.