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Rosetta Stone III In Sunnyvale, the Summers are very hot. Joyce Summers and her

ID: 2907598 • Letter: R

Question

Rosetta Stone III In Sunnyvale, the Summers are very hot. Joyce Summers and her two daughters Buffy and Dawn, live in a small house in Sunnyvale. A family friend, Rupert, has suggested that the air conditioning bill would be much lower, if they add some nice maple and oak trees along the south and west side of the house. Buffy's friend Willow, who is of course partial to trees, asked, "But, won't that also make it colder in the winter?" Xander and Cordelia have given you the graph on the following page [editor: enlarged by 175%]. "Figure 3 .Simulated annual heating, cooling, and total space conditioning energy savings for single 15-year-old deciduous trees (24-ft tall and 24-ft wide) planted opposite the south (a.) and west (b.) walls of a building with maximunm insulation." For their house, the average season's heating bill is $500 and the cooling bill is $750. Should the Summers plant trees? How much would they save in heating and cooling costs by planting a tree on the south side of the house? How much would they save in heating and cooling costs by planting a tree on the west side of the house? On which side(s) of the house should trees be planted?

Explanation / Answer

1. Yes, they should plant the trees since their cooling bill is more than their heating bill(250dollars more). Planting the trees will reduce the cooling bill significantly, even if their heating bill increases they will still profit.

2. They will not save anything by planting trees on the south side, their savings will decrease by 3%.

3. They will save 5% more by planting tress on the west side.

4. Trees should be planted on the west side.