THE TYPE OF DELIVERY MASKS WHICH IS COMMONLY USED AND THAT GIVES ABOUT 50% OF OXYGEN AT FLOW RATE OF 10 LITERS/MINUTE TO THE PATIENT ,IS:

venturi mask is the answer

the answer is:

i had an assignment in the biology course where i should write a few paragraphs about an experience. the teacher didn't give us a rubric. if i had one i could have paid closer attention to the criteria that has the highest scores. this could have improved my grade.

hope it !