In this case the Teacher is carrying out an experimental estudy.
Step-by-step explanation:
In this case, the Teacher is carrying out an experimental study. Because three things make it an experiment. First, the teacher puts the test to all of her students. Without sampling or choosing a representational population. She controls the conditions the students undergo and she also hey are recorded. So her manipulation of the environment separates it from observation. Also, she practices the study in all of them so there is no simulation all data is real. Thus, an Experimental study is a correct answer. She runs tests o all of them without asking any question discarding census.
First you would find the total of all of the 4 bags. Witch would be 4x19=76. Then you would multiply that by shipping cost 76x5=380. Lastly you would add the $25 380+$25= 405. Think that is right. Hope this helps!
