at least 20 cigarettes are in a pack in usa.
at least 20 cigarettes are in a pack in usa.
number of cigarettes in a pack in usa?
at least 20
in malaysia, the selling of packs containing fewer than 20 cigarettes is prohibited.









































in the united states, the quantity of cigarettes in a pack must be at least 20. certain brands, such as export as, come in packs of 25. for many years, half-packs of 10 (or even 14) cigarettes were commonly available.
cigarette pack
the pack-year is a unit for measuring the amount a person has smoked over a long period of time. it is calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the person has smoked. for example, 1 pack-year is equal to smoking 20 cigarettes (1 pack) per day for 1 year, or 40 cigarettes per day for half a year, and so on.









































one pack-year is the equivalent of 365.24 packs of cigarettes or 7,305 cigarettes.









































section::::calculation.









































number of pack-years = (packs smoked per day) × (years as a smoker)









































"or"
pack-year