"Four score and seven years ago...equals." Why is this an especially effective way for Lincoln to begin his speech?

Find the explanation below.

Explanation:

A score represents twenty years. Thus four scores meant 20 * 4years which equals 80years. Eighty years plus seven years equals eighty-seven years. Eighty-seven years ago before Abraham Lincoln delivered the Gettysburg address in 1863 dated back to 1776 when the Declaration of Independence was signed.

It was important that he made reference to this year because he wanted to draw attention to the sacrifices made by the founding fathers of the American nation and to highlight the values which they sought for. These values included the quest for liberty and equality among all the citizens of the country.

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.

research question: do the predicted benefits of genetic enhancements outweigh the possible negative consequences of this technology?  

what information do i need to research in order to answer this question?  

-predicted benefits of genetic enhancements

-negative consequences of genetic enhancements

-existing, if any, consequences of the new technology

-possible consequences if the technology is perfected

what sources will have the information?

-scientific research documents or news articles summarizing research

-articles in science and medical journals, magazines, and electronic databases

-books

-experts at genetics: geneticists, scientists, professors

here you go have a nice day