What does a file extension tell you?

20 points archie wants to use a reflector as he photographs a newlywed couple. what would he consider in his choice? a. shadow and sunny b. homemade and professional c. lamps and boards d. incident and reflected e. neutral density and enhancement

Me ajude por favor , coloquei uma senha e não consigo tira-la no chorme

What are "open-loop" and "closed-loop" systems