Bob has a bookcase with 4 shelves. There are k books on each shelf. Using k, write an expression for the total number of books.
Total Books = Bookcases * shelves per bookcase * books per shelf
Total Books = 1 * 4 * k
Total Books = 4k
Total Books = Bookcases * shelves per bookcase * books per shelf
Total Books = 1 * 4 * k
Total Books = 4k