North Carolina(wake county public system) total hours for a credit in a course...

Hi guys…
I am wondering if anyone of you knows what is the minimum required hours in a class for getting a credit. For example, in order to get a full credit in biology, how much hour do you have to spend on it in class?

I am wondering the required hours for credit in

(high school)

  • biology
  • earth science
  • physics
  • Chemistry
  • NC math 1 (algebra 1)
  • NC math 2 ( geometry) -NC math 3 ( algebra 2) -Healthful living(P.E.)

Please help me…