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You place a 22-cm focal length convex lens at a distance of 50 cm in front...

You place a 22-cm focal length convex lens at a distance of 50 cm in front of a concave lens with a focal length of -40 cm. Then you place a small lightbulb (2 cm tall) 27 cm in front of the convex lens.

Determine the distance from the second lens to the final image

Express your answer with the appropriate units

s'=

it is NOT 20.44 or -20.44 cm

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