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updated: 2021-06-07
"'Those who wish to enjoy peace must be ready for war.', [Epaminondas] lectured them [in 370BCE], 700 years before Vegetius's more famous Roman dictum, Qui desiderat pacem, praeparat bellum." --- Victor Davis Hanson 1999 _The Soul of Battle: From Ancient Times to the Present Day, How 3 Great Liberators Vanquished Tyranny_ pg54 |
U | M | T | W | R | F | S |
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 |
8 | 9 | 10 | 11 | 12 | 13 | 14 |
15 | 16 | 17 | 18 | 19 | 20 | 21 |
22 | 23 | 24 | 25 | 26 | 27 | 28 |
29 | 30 | 31 |
GREAT |
"GREAT" |
K | kilo- | thousand | 10^3 | 1,000 | |
M | mega- | million | one thousand thousand | 10^6 | 1,000,000 |
G | giga- | billion | one thousand million | 10^9 | 1,000,000,000 |
T | tera- | trillion | one million million | 10^12 | 1,000,000,000,000 |
P | peta- | quadrillion | one million billion | 10^15 | 1,000,000,000,000,000 |
E | exa- | quintillion | one billion billion | 10^18 | 1,000,000,000,000,000,000 |
Z | zetta- | sextillion | one billion trillion | 10^21 | 1,000,000,000,000,000,000,000 |
Y | yotta- | septillion | one trillion trillion | 10^24 | 1,000,000,000,000,000,000,000,000 |
Except that computer people use 2 as a base raised to multiples of powers of 10, instead of 10 raised to multiples of powers of 3 because powers of 2 are handier for them, but they also want to stay somewhat close to the values of 10 most folks are used to.
1,024 | K | kilo- (kibi-) | 2^10 |
1,048,576 | M | mega- (mebi-) | 2^20 |
1,073,741,824 | G | giga- (gibi-) | 2^30 |
1,099,511,627,776 | T | tera- (tebi-) | 2^40 |
1,125,899,906,842,624 | P | peta- (pebi-) | 2^50 |
1,152,921,504,606,846,976 | E | exa- (exbi-) | 2^60 |
1,180,591,620,717,411,303,424 | Z | zetta- (zebi-) | 2^70 |
1,208,925,819,614,629,174,706,176 | Y | yotta- (yobi-) | 2^80 |
3. 14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 ≅ π
"One major study tested roughly 1K people's knowledge of algebra and geometry. Some participants were still in high school; the rest were adults between 19 and 84 years old. The researchers had data on subjects' full mathematical education. Main finding: Most people who take high school algebra and geometry forget about half of what they learn within 5 years and forget almost everything within 25 years. Only people who continue on to calculus retain most of their algebra and geometry... Basic literacy and numeracy are virtually the only ‷book learning‴ most [USA] adults possess. While the average [USA citizen] spends years and years studying other subjects, they recall next to nothing about them. If schools teach everything we know about history, civics, science, and foreign languages, their achievement is pitiful." --- Bryan Douglas Caplan 2018 _The Case Against Education: Why the Education System Is a Waste of Time and Money_ pg40 |
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