9. a statistical model predicts the daily demand for pilots across the airline’s network. (a) how would you evaluate the performance of this model? (b) how would you modify the existing model to predict how many pilots need to be hired over the next five years?

What are the six basic purposes of government as outlined in the preamble to the constitution?

Which of the following early north american cultures were known for building wigwams and longhouses? a. eastern cultures b. great plains cultures c. western cultures d. northern cultures

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.