Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Re: Real world problem - dumpster dives
Replies: 0

 MCotton@aol.com Posts: 90 Registered: 12/6/04
Re: Real world problem - dumpster dives
Posted: Jun 12, 1996 10:25 PM

During Earth Week, the civics teacher used 3 class periods one afternoon for
a dumpster dive. That means pulling 24 hour's worth of trash out of the
dumpster then sorting and weighing the recyclable materials. A few days
later, I used their data in my math classes. We made the assumption that the
data was representative of a typical day, then determined the percentages of
each type of recyclable, predicted how much could be collected in a year,
used current market prices to predict the value of a year's worth of each
recyclabe material. We considered the costs of collection, storage, and
transportation to a center that would purchase the materials. Costs had to
include volume as well as weight. The result was a school decision to begin
by selling the aluminum and splitting the resulting profits equally between
the 4 high school classes - an estimated \$500.00 per year. Other recyclables
would continue to be collected but they would be given to the local recycling
center because the costs of storage and transportation to a potential
purchaser were greater than their value.

Earth Day 1997, we will re-evaluate our recycling statisics and the dumpster
contents.

Marge Cotton
mcotton@aol.com
Eureka Springs High School
Eureka Springs, Ar