Each society can have only one culture operating within it at a time. true or false

It would be completely false to say that each society can have only one culture operating within it at a time. The correct option among all the options that are given in the question is the second option. A society can have more than one culture operating within it in a peaceful manner. There is no binding about the number of cultures within a society.

0.00067=67X10^5 so

67X10^5-2.3X10^5

64.7X10^5 which can be expressed as:

6.47X10^6

(not sure if it matters to you or not, but technically we only had two significant figures so it should be rounded to 6.5X10^6)