Duct tape is used to seal joints in duct insulation. A roll of duct tape contains 280 inches of tape. A 10-inch round duct with a 1-inch layer of insulation on it will need a piece of tape 37 3/4 inches long to cover the seam and overlap itself. How many seams will one roll of duct tape cover?
Fill in the blank(s) with the appropriate word(s).
Answer: 7
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