Norah wants to buy a mirror so that she can check on her appearance from top to toe before she goes off to work. If Norah is $1.64 \mathrm{~m}$ tall, how tall a mirror does she need?
Added by George R.
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When Norah stands in front of the mirror, the light from her feet will travel to the mirror and then reflect back to her eyes. The same goes for the light from her head. Show more…
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