Ok......you win. You seem pretty sharp for 12 Keep up the good work !! I'll try to give ya a Thumbs up for good answers (show your work)......
Cphill and I have have gone around on this stuff a bit (he doesn't know it) ....but a lot of time you have to make ASSUMPTIONS which will justify your answers (because sometimes the posted questions are vague or unclear).......When I was in Engineering school......you only got partial credit (even if your answer was correct) if you didn't state the parameters or assumptions which led you to your conclusion/answer.......
Hope you go into STEM as you wnader on down the school road! It is snowing here in CO......I just rode my bike home from the Hospital and am off for a few days.....I'm gonna go sit in the hot tub with a beer and watch it snow,,,,,
Have agood night ! ~jc