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,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
<span>At the PEAK of slavery in 1860, only 1.4% of Americans owned slaves. What your history books (don't) tell you is that 3,000 blacks owned a total of 20,000.</span>
an Italian mathematician at the University of Padua, directed a new scientific instrument, the telescope, toward the heavens. Having heard
that a Dutch artisan had put together two lenses in a way that magnified distant ob- jects, Galileo built his own such device. Anyone who has looked through a tele- scope can appreciate his excitement. Ob- jects that appeared one way to the naked eye looked entirely different when magni- fied by his new “spyglass,” as he called it. The surface of the moon, long believed to be smooth, uniform, and perfectly spheri- cal, now appeared full of mountains and craters. Galileo’s spyglass showed that the sun, too, was imperfect, marred by spots that appeared to move across its surface. Such sights challenged traditional sci- ence, which assumed that “the heavens,” the throne of God, were perfect and thus never changed. Traditional science was shaken even further when Galileo showed that Venus, viewed over many months, appeared to change its shape, much as the moon did in its phases. This discovery provided evidence for the relatively new
The agreement that ends the Spanish-American War shows that America was not only motivated to help Cuba because of oppressive Spanish rule. Rather, this document shows that the US wanted to expand their territorial and political power.
The Treaty of Paris (signed December 10,1898) resulted in Spain renouncing their claim to Cuba. Along with this, the Spanish also gave the US the territories of Guam and Puerto Rico. The fact that the US received these territories shows that this war was about much more than just trying to help Cuban citizens get rid of a corrupt Spanish government.
Answer:
they treated blacks as slaves in America
Explanation:
the blacks are treated as slaves because in America from starting they are having race discrimination they think whites are rulers and blacks are slaves and born to do slave works to whites &still is continuing in to today
