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Smoking 15 cigarettes daily for 10 years equals 7.5 pack years: (15 20) 10 = 7.5 Smoking 20 cigarettes daily for 5 years equals 5 pack years: (20 20) 5 = 5 Smoking 40 cigarettes daily for 25 years equals 50 pack years: (40 20) 25 = 50 Smoking 10 cigarettes daily for 2 years equals 1 pack year: (10 20) 2 = 1 These examples demonstrate how the formula applies to varying smoking habits
Cross-country differences in sales taxes only contributed 4 percentage points to the 26% after-tax gap
Education: University of Utah for both undergrad and law school
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Sources: American Lung Association
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