List 2 terms that refer to countries who enjoy great wealth, advanced technology and easy access to medical care.

What two properties affect the density of ocean water

Computer models can scientists predict weather. some computer models can show the predicted path of hurricanes. what other events could a computer model warn us of? a) undersea earthquakes , tornadoes, and avalanches b) tornadoes c) avalanches d) undersea earthquakes

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4