# Vicki puts 10 books on a shelf. The 10 books take up 28 centimeters. What is the mean (average) thickness of her books? = 2.8 cm The shelf is 120 centimeters long. Vicki fills the shelf with a mixture of books like the first ten books. Estimate how many books she can get on the 120 cm shelf. Please show your working out. Thanx

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