SOLUTION: Can someone please help? The number N of aluminum can used each year varies directly as the number of people P using the cans. If 57 people 19,893 cans in one year, how many ar

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Question 396096: Can someone please help?
The number N of aluminum can used each year varies directly as the number of people P using the cans. If 57 people 19,893 cans in one year, how many are used in a city which has a population of 1,329,0007.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
I use what is called a "constant of proportionality" called k
I write an equation:
P+=+k%2AN
This is read as " The number of people is proportional to
the number of cans.
given:
57+=+k%2A19893
k+=+.0028653
----------------
Now I can write:
13290007+=+.0028653%2AN
N+=+4638260217
4,638,260,217 cans are used