



 
Hi Jill, $3 \times 4" = 12" = 1 \mbox{ foot}$ and hence it takes $3 \times 3 = 9,$ 4 inch square tiles to make a square foot. You need to cover 50 square feet so that will take at least $9 \times 50 = 450$ tiles. Depending on the shape of the region you want to cover there may be some cutting required and hence some cutting. Hence you may need more than 450 tiles. Penny




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