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July 24, 2014

July 24, 2014

Posted by **Kai** on Saturday, December 17, 2011 at 11:40pm.

The amount P of pollution varies directly with the population N of people. City A has a population of 494,000 and produces 260,000 tons of pollutants. Find how many tons of pollution we should except City B to produce if population is 344,000. Do not round until final answer, then round to nearest ton as needed

- math -
**drwls**, Sunday, December 18, 2011 at 4:52amIs "except" supposed to be "expect".

OK, so P = C N where C is a constant

This implies

Pb/Pa = Nb/Na

The subcripts denote cities A or B

Pb = Pa*(Nb/Na)

= 260,000*(344/494)= 181,053 tons

- math -
**Kai**, Sunday, December 18, 2011 at 8:55amit is expect. thanks

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