Himwood has 1200 ft2 of roof in his home in pittsburgh, pa (hdd = 6,000). he is considering upgrading the insulation from r-16 to r-22. the estimate from the contractor was $520. his home is heated with natural gas. last year, the average price he paid for natural gas was $13.3/mcf. assuming an afue of 82.2%, how long will it take himwood to recover his investment?
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In which quotes does the author use the word "chains" literally? in which quotes does she use the word figuratively?
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Identify the expression 8 + 8 + 8 + 8 as a numerical expression or a variable expression. for a variable expression, name the variable.
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Himwood has 1200 ft2 of roof in his home in pittsburgh, pa (hdd = 6,000). he is considering upgradin...
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