How does the author explain the entrance of Portugal into the African slave trade?

What feature do the arkansas river valley and the mississippi alluvial plain region have in common

How can misinformation interfere with memory? how might the memory of an eyewitness be affected by testing if they receive misinformation?

Say a certain manufacturing industry has 63.1 thousand jobs in 2008, but is expected to decline at an average annual rate of 1.7 thousand jobs per year from 2008 to 2018. assuming this holds true, what will be this industry’s percent change from 2008 to 2018? a. 70% b. -27% c. -17% d. -75%