Assuming you mean the Great Plains of the USA- it boosted their sales because of the government buying more wheat to ship overseas to assist in refugee and military supplies, assuming the farmer(s) were not drafted into military service themselves.
assuming efficiency of each man to dig trench, in one day, for one hour is constant,

so one man, working for one hour in one day can dig 1.5 m
so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
I’m pretty sure they resided to a cavalry? I know the answers on the internet
Answer:
Letting women do the same jobs as men.
Explanation:
The Maya civilization was one of the powerful indigenous societies in Mesoamerica. The Maya centred in one geographical section covering part of Central America and South America. In the ancient Maya civilization, women were held in high regards and were equal to males. Women looked as essential as they bore and raised children. They also could take place in economic and political discussions, as well as practice farming activities.
From a population of 500 in 1896, the town grew to house approximately 30,000 people by summer 1898. Built of wood, isolated, and unsanitary, Dawson suffered from fires, high prices, and epidemics. Despite this, the wealthiest prospectors spent extravagantly, gambling and drinking in the saloons.