The outside mirror on the passenger side of a car is convex and hasa focal length of -7.0 cm. Relative to this mirror, a trucktraveling in the rear has an object distance of 18 m.Find (a) the image distanceand (a) the magnification of themirror.

my answers for a) -5.04m and b) .28 areincorrect!!!

I dont know what i've done wrong.


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