4, 1, and 3
The last one I am going to say three because I know that friends show other friends so I wouldn’t call that “private”
Answer:
360/number of sides
Explanation:
all the exterior angles add up to 360°
so to find each angle mesure, divide the 360 by the number of sides the figure has.
3.28% I think
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Answer:
1) Yes, Publisher relation should have a publisherID primary key.
2) NOT NULL and UNIQUE for the BookID, BranchID, CardNumber and name of the borrower in the Book, Book_Copies, Library_branch, and Borrower relations respectively. The DueDate field of the book_loan relation must be a time constraint. The BookID of the Book relation must be serial number for automatic addition and update of bookid across the database.
Explanation:
The Publisher relation should have primary key publisherID which should replace the publisherName in the Book relation to easily make a join query and attain a third-level database model.
