How did the discovery of radioactivity enable the direct measurement of deep time?

Which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus

Which economic sector employs the least number of people in mexico, barbados, and venezuela? a. agriculture b. services c. industry

Question 4 of 10 2 points how were the reasons for a person's enslavement different in west african cultures than in the atlantic slave trade? o a. in west african cultures, any unmarried man could be enslaved, while in the atlantic slave trade, only prisoners of war could become slaves. o b. in west african cultures, people had to be born into slavery, while in the atlantic slave trade, people had to commit a crime to become a slave. o c. in west african cultures, people could only become slaves if they owed debts, while in the atlantic slave trade, slavery was used to punish crimes. o d. in west african cultures, people were enslaved through war or as punishment, while in the atlantic slave trade, anyone could be ſom captured and enslaved previous obi