As is her habit in any business transaction, Elaine did some quick back of the napkin math while John was on the phone with the claims adjuster. (effectivecoverage.com)
Employing back of a napkin calculations, TSI would need to fall roughly 4.3 W / m2 to provide 0.6 °C of cooling. (skepticalscience.com)
Quick back of the napkin math shows that the tournament saved about $ 20,000 by paying their normal electricity rate for wind power. (treehugger.com)