Wie sind die Häuser im antiken Rom entstanden?translates as How were houses developed/created in ancient Rome?
sie sind wie alt = how old are they Sie sind wie alt = how old are you n.b. the difference is in the capitalisation of the word Sie/sie
Sind sie wie alt? makes no sense whatsoever in German. You could either askWie alt sind sie/Sie = how old are they/yousie/Sie sind wie alt = how old are they/you orthey/you are how old
how are = wie sind
Wie sind die Ionen in Zinksulfid geladen?translates as What are the charges of the ions in zinc sulfide.
How old are you? transaltes as Wie alt bist Du? (informal) or Wie alt sind Sie?(formal).
1 Deziliter sind 100 Milliliter.
How much is 100ml?
What is/are the technical data?
"Wie alt bist du, wie alt sind Sie?" is "How old are you?" in the German Language.
127.28
70 Meter sind wie viele Kubikmeter Beton?translates as 70 metres are how many metres of concrete?
How old are you? is wie alt sind Sie? in German (formal) or wie alt bist du? (informal)