Posted by **lidia** on Monday, April 8, 2013 at 4:27pm.

Your school librarian has asked your class for some help on the purchase of some new bookcases with 2 shelves each. She has 300 new books she needs to shelve. 1/2 of the books are half an inch thick. 1/3 of them are 1/4 of an inch thick, and the rest are three fourths of an inch thick. Her shelves are 30 inches long. How many bookcases should she buy? Show your work.

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