If you look at yourself in a shiny Christmas tree ball with a diameter of 8.3 cm

Question

If you look at yourself in a shiny Christmas tree ball with a diameter of 8.3 cm when your face is 29.0 cm away from it, where is your image? Express your answer using two significant figures. di = ??? cm
I got an answer but its not acceptable
5 minutes to answer If you look at yourself in a shiny Christmas tree ball with a diameter of 8.3 cm when your face is 29.0 cm away from it, where is your image? Express your answer using two significant figures. di = ??? cm
I got an answer but its not acceptable
5 minutes to answer

Explanation / Answer

v = image distance
Real is Positive sign convention.

1 / 29.0 + 1 / v = - 2 / 4.15
v = - 1.936 cm.

Virtual.

Upright.

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