Energy A homeowner in Ohio decides to add insulation to the area between her roo
ID: 293314 • Letter: E
Question
Energy A homeowner in Ohio decides to add insulation to the area between her roof and her ceilings to save moncy on heating her home. She learns that the better the insulation the higher the purchase cost She also learns that, with little difficulty, she can do the installation project on her own, thus saving about five hundred dollars in labor costs. She reasonably decides to install the more expensive insulation herself She purchases the insulation for five hundred dollars. She caleulates that she will save fifty dollars per month in utility costs. The cheaper insulation would have cost four hundred dollars and would have saved thirty-five dollars per month. 15) Which insulation had the higher R-factor? a) The cheaper insulation. b) The more expensive insulation. 16) How long will i take for the monthly savings to pay for the chosen insulation? a) $500 $50 per month ten months b) $500 x $50 per month 25000 months c) S500/$35 per month fourteen months d) s400/$50 per month eight months e) $400 S35 per month eleven months 17) How long would it have taken for the monthly savings to pay for the cheaper insulation? a) $500 S50 per month ten months b) S500 x $50 per month 25000 months c) $500/$35 per month fourteen months d) S400 / $50 per month-eight months e) $400/S35 per month - eleven months metallation herselt?Explanation / Answer
Answers:
15) The answer is b) The more expensive insulation. An insulator's heat resistance is measured in terms of the thermal resistance or R-factor and the higher the R-factor, greater will the insulating effectiveness. As given in the question, that better the insulation, higher will be its purchasing cost, the expensive insulation will have more R-factor.
16) The answer is a) $500/$50 per month = ten months. The total cost for the chosen insulation is $500. And as she choses to install the insulator on his own, she can save upto $50 per month. So, simply put, the time required to meet the expenditure can be expressed as: total cost/saved money per month, which gives 10 months for this choice of insulator.
17) The answer is e) $400/$35 per month = eleven months. The total cost for the cheaper insulation is $400. And here, $35 can be saved per month. So, similarly, the time required to meet the expenditure can be expressed as: total cost/save money per month, which gives 11 months here. Actually, it needs a little more than 11 months, 12 months would be the answer as $35*11 = $385. But as there are no other option, this option is the closest.
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