Why entity relationship is important in database modeling?

Ihave been given the number of guns per 100, and the total firearm-related deaths per 100,000. i have to find the actual number of guns per country and actual number of gun-related deaths. if somebody could show me how to do 1 question, i can finish the rest, i am just confused. tia

In the blank libreoffice writer document, to start the process of entering a date field into a letter, click on the insert menu. edit menu. file menu. fields menu.

Verify each identity[tex] \frac{csc}{cot \: x \: + \: tan \: x} = cos \: x[/tex]