Respuesta :
The answer would be 30 but im not sure you worded the question correctly, did you mean which day would it be if 30 days pass friday? if so the answer is saturday
Well I'm guessing the answer is 30 days until it appears on a friday again. In order to see the full moon again, we have to go through the full cycle so therefore, it will be about 30 days before we see another one.