Suppose you have an attic room measuring 5.0 m by 5.0 m and maintained at 21°C when the outside temperature is 4.0°C.
a) If you used R-19 insulation instead of R-30 insulation, how much more heat will exit this room in 1 day?
b) If electrical energy for heating the room costs 12 cents per kilowatt-hour, how much more will it cost you for heating for a period of 3 months with the R-19 insulation?
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