There are 7 days in one week, therefore 91 days is equal to 91 / 7 = 13 weeks.
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1 week = 7 days, 91 ÷ 7 = 13 so 91 days = 13 weeks
THere are 91 days in 13 weeks. 1 week = 7 days, and 7 x 13 = 91
13 weeks.
7 days = 1 week Sept + Oct + Nov = 30 days + 31 days + 30 days = 91 days = 91 ÷ 7 weeks = 13 weeks
7x13=91 days