Which of the following countries is one of the least densely populated in the world? taiwan japan mongolia china

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

Landmasses on a flat map look distorted because

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions