Respuesta :

If you take the earth's roundness you can't see after 5 km. If you assume you are on a mountin or st. then it is true
Hello, I'm Steel42 and I am here to help

Yes, a human can detect a candle flame 30 miles away, true.

For example, your walking to your house, and you see a light, and you know what it is, because candle flames are very bright.

Answer: True

Hope I helped you today  ; )