$21^{\dfrac {1} {20}}$ $617$ $21^{\dfrac {1} {20}}$ $2+ \begin{cases} 3\left(-10\left(\dfrac {1} {4}-\dfrac {4} {5}+2-\dfrac {1} {5}\right)+\dfrac {11} {2}\right)-9\right) \\ 4 \end{cases} $ $\bar{\sqrt{\dfrac {1} {2}} } $ $\dfrac {\bar{\left(\dfrac {3} {4}\right)} \times \sqrt{\dfrac {1} {3}} } {\times 2\sqrt{\left(\dfrac {3} {4}|} }\right)^{2}$ $4$ $\left(\dfrac {1} {\sqrt{7} }+-+\dfrac {2} {\sqrt{28} }+\times \sqrt{} \right)\left(\sqrt{112} +3\sqrt{26} +4\sqrt{63} -5\sqrt{112\right)} $ $\sqrt{28} $ $+\dfrac {12} {25} \begin{cases} \sqrt{1} \\ \dfrac {2^{\times 2\sqrt{\left(\dfrac {3} {4}\right)} }} {3\sqrt{|\dfrac {3} {4}|} \times \dfrac {\sqrt{1} } {3}}+ \end{cases} $ $3\sqrt{\left(\dfrac {3} {4}\right)} \times \sqrt{\dfrac {1} {3}} $ $3\longdiv{}1$ $\left(\dfrac {1} {3}$ $\left(8\right)$ $\left(6\right)^{7}$ $=$ $3|$ $\left(\dfrac {1} {3}\right)$ $\left(2\right)$ $\sqrt{\sqrt{2^{2}} } $ $\left(3\right)$ $\times 7\sqrt{\left(\dfrac {6} {7}\right)^{2}} $
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search-thumbnail-The Aztecs had modest beginnings, serving as mercenaries for other
$0s$ $cc0m$ Societyy. $9$ $m1$ $o3$ $ax0oAo$ $s$ $o$ $a10$ $28sm$ $s\times $ $scnc9a990es$ $con$ escLreibe e eel n sigpausieandto e que eWstáan ste entre society ) paréntesis (Valor 10 puntos). The Aztecs of Mexico: A Zero Waste Society The Aztecs had modest beginnings, serving as mercenaries for other nations. In time, their reputation as fierce warriors grew and they (build) a $1\left(y-state$ Since other indigenous nations had already settled around the lakes on more desirable land, the only way for the Aztecs to accommodate a growing population (is). to develop around the small island. The Aztecs expanded $e\times |co-Ten0chtiHdn$ by building chinampas, or artificial islands... Most residents of $Me\times ic0=TenQcht+|an$ (live) on chinampas, where they also (grow) their (acrreop) s. Lake channels surrounded all four sides of each chinampa and wide enough for a canoe to navigate. These channels provided crop irrigation and an easy way to transport products to market... Aztec waste management The city expanded and the number of chinampas grew with it. By the year 1519, when the Spaniards (arrive) L $le\times 1c0-Ten0chttH$ $n$ had a population of over 200,000. It was the largest city in the Americas, caitny d one of the largest in the world – bigger than any European at the time... Due to the climate, the $abundancg$ of water and sunlight, as well as a temperate chinampas were highly productive, producing up to four crops a year, and about $w0=tnrds$ of the food consumed in the city. Another important factor in maintaining that high productivity was the intensive recycling nutrients. The Aztecs disposed of all kinds of organic wastes $ingofnU$ $lnthech$ $fe+ze$ chinampas, such as food leftovers and agricultural residues, which the crops. Further, the most valuable fertilizer used on the chinampas was human excrement. With other uses, such as for tanning leather, the excrement was swo as vacluoleld ecttehd at atnhd e ecvitey nthuaad lly a network of public latrines from which it (sell) at the city's main market. Human urine was used as a mordant $\left(fi\times ative\right)intnedyeinC$ $offabncs\right)$ and, thus also considered a resource... In Aztec times, Mexico sheep, goats or chickens (they were but the Aztecs wild consumed animal $\left(n$ $tn$ $ve$ $n$ $oducedby$ $neE$ $op$ $an$ $\right)$ $keys$ $duks$ $de$ $oten$ $o$ $ab$ $d0tdog$ $ase\right)edn9$ $hem$ $o0d$ $eF0$ fish, and itoztchueinr tli animals. They also protein cdaetteler, , they called for human consumption, leftovers... By recovering and recycling this waste, the Aztecs prevented pollution in the lakes that surrounded $ye\times 1c0=Tenocnt1+|an$ Any burnable materials, such as textiles, were recovered and burned at night in order to illuminate public spaces... During the rule of Moctezuma $1\left(1502t01520\right)$ dumping of waste and even littering in public spaces was prohibited and penalized. In some cases the penalties for violating the law would be considered disproportionate by today's $tan4ax$ $63$ a person could be sentenced to death for cutting down a living tree without proper authorization. Aztec society expected its rulers and nobility to be role models and stipulated stiffer penalties for them than for the general population if they violated the law... $ye\times 1c0=Ten$ $cn+1+|an$ had officials in charge of maintaining cleanliness and street sweeping. Scavengers - (call) pepenilia -were in charge of recovering recyclable materials. Interestingly, Mexican scavengers today are still called pepenadores (singular pepenador), which stems from the verb pepenar, for "to $sCrounqe/select$ that is itself derived from a Náhuatl (the Aztecs' language) word for to $chnnco/co1oc1$