Which of the following was a spanish colony but is now a u. s. commonwealth?
haiti
cuba
puerto rico
dominican republic

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

Which of the following statements best describes what is occurring in the land surrounding the sahara desert? a desertification is increasing, and the desert is expanding. b. fewer people are trying to farm in this semiarid region. c. the desert is shrinking with the increased use of irrigation. d. increased urbanization has resulted in decreased deforestation. select the best answer from the choices provided mark this and return save and exit next submit