algebra
posted by rr .
The number N of aluminum cans used each year varies directly as the number of people P using the cans. If 54 people use 19,926 cans in one year, how many cans ae used in a city which has a population of 1,485,000

This is a problem of direct proportion, i.e. more people, more cans.
so formulate the question as:
19926 cans/54 people = x cans/1485000 people
Cross multiply to get:
x=19926*14850/54= how many cans
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