andreaisabela
27.11.2019 •
Business
Dave has a home in pittsburgh, pa (hdd = 6,000) with a roof area of 1582 ft2. he is considering upgrading the insulation from r-16 to r-28. the estimate for this job from the contractor is $878. dave’s home is heated with natural gas. last year, the average price he paid for natural gas was $12.2/mcf. assuming an afue of 87%, how long will it take dave to recover his investment (in years)?
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Ответ:
Eukarya
Explanation:
cells that have a nucleus and a cell wall as well as the ability to conduct photosynthesis.