MedSG

Our professor gave us this homework to solve and I was wondering if someone could just tell me if the answer is correct or not because one of my friends told me there were "mathematical and scientific" issues with the way I solved the equation or the numbers I used The homework and Excel file which includes the graph is in this link. I apologize for the messiness, lack of scientific language and probably not being clear in some parts but this is a very rough draft, I just need to know if what i solved is correct since my friend's remark made me doubt everything I did. Thank you very much in advance

I'm not sure if this is the place to ask this but I hope it is. Our professor gave us this homework to solve and I was wondering if someone could just tell me if the answer is correct or not because one of my friends told me there were "mathematical and scientific" issues with the way I solved the equation or the numbers I used The homework and Excel file which includes the graph is in this link. I apologize for the messiness, lack of scientific language and probably not being clear in some parts but this is a very rough draft, I just need to know if what i solved is correct since my friend's remark made me doubt everything I did. Thank you very much in advance