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this post was submitted on 01 Jul 2024
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Asklemmy
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okay so I had AI do the math for me.
"I drove a screw with a hammer"
cool story
source: http://www.airimprovement.com/reports/national-e15-analysis-final.pdf
This gives us tha the 88 octane has 106.8/108.6 โ 0.983 times the energy density of the 87.
1-0.983 = 0.017
The correct number is that the 88 needs to be 1.7% cheaper than 87 to give equivalent distance per dollar.
LLMs are fantastic tech, good at many things. Math is not one of those things.
yeah that's why I labeled it as ai. like I can figure it out as a word problem to tell somebody, but I can't figure out the math from there
I didn't feed it the energy density of e10 vs. e15, I just told it that ethanol was 30% less efficient, and gave it the percentages.
The AI does nothing with the percentages because it is an LLM, not an AI designed for math. All an LLM does is take a small number of words and turn them into a different set of words. It does not use your small set of words to run any formulas on your behalf.
Years ago I had an E85 compatible vehicle when that was how we were going to save the planet before hybrids came along. E85 was cheaper than unleaded, but after crunching the numbers it was always the exact same cost per mile. Considering there were almost no stations with E85 fuel available, it just never made sense to go far out of my way to pay the same.
AI is decent for writing, but a terrible choice for math.
ok but I am objectively a worse choice for math