Question: 49. Refer to Example 2- 7. If the average inside temperature of this house in Virginia is increased from 65F to 72 F, what

49. Refer to Example 2- 7. If the average inside temperature of this house in Virginia is increased from 65◦F to 72 ◦ F, what is the most economical insulation amount? Assume that 100,000,000 Btu are lost with no insulation when the thermostat is set at 65◦F. The cost of electricity is now $0.086 per kWh. In addition, the cost of insulation has increased by 50%. Develop a spreadsheet to solve this problem. (2.3)

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