Category Archives: math

Dear health insurance company…

Dear health insurance company… Your recent letter indicating that rates are “only” increasing 5% in 2013 is a joke. You realize the math, right? If inflation is ~3% currently/historically, then a 5% annual increase (effectively 2% in current year dollars) means that health insurance prices will DOUBLE in ~36 years (using the “rule of 72”). 1.02^36 ~= 2

Yeah, good luck with that working out everyone!

See also: or google “inflation historical”
– rule of 72 —

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Filed under health, health insurance, math

That old TV…

Let’s say a 10-year-old analog “CRT” TV (now with little digital converter box for the US) is used 4 hours per day at ~100W average consumption during baseball season.

Let’s say a new LCD TV (22″) — Panasonic TC-L22X2 (29.4 watt avg) could replace it.

Over 1 month that would be:

30days * 4hr * (100-29.4)watts/1000 = 8.472 KWh
* $0.15/KWh = $1.27 saved per month

That is not including the heat the TV provides in the winter (~100W) or the AC it then might require in the summer.

Not such a big deal, energy wise. But it adds up I suppose. But it (buying a new tv) is money better spent on paying back credit card debt or new lightbulbs or sealing up the attic with foam if you don’t care about HD and such.

Or only watch TV in the winter?

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Filed under energy, erik-green, math