Answer:
The Louisiana Purchase was a land deal between the United States and France, in which the U.S acquired approximately 827,000 square miles of land west of the Mississippi River for $15 Million.
Hope this helps.
Answer: This is a "CONTROLLED PLACEBO EXPERIMENT".
Explanation: A controlled placebo experiment is a type of research method that is used to check the effectiveness of a drug in a patient. This is done by selecting a sample group, then randomly divide the two group into a placebo group ( this are the group that will receive the drug treatment ) and the controlled group( these are the group that will receive a coloured mixture that looks like the drug, but does not have any effect). Without the groups knowledge about the real drugs and the coloured mixture, but are followed up and tested.
This is a controlled placebo experiment, because 400 student has been choosed as the sample, and are divided into a placebo group and a controlled group, to check the effectiveness of a drug on their memory.
The answer is (3a+2b)(a-4c) that’s what I got when I put it in a math calculator
B. representative
There are representatives for each level of politics. That's who we vote for when we vote!
Framing effect is Judging someone on the basis of one's perception of the group to which the person belongs
