What is the study of man and his material needs

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

What are the answers for the following questions?

Ron is moving to oceania because his mining company recently opened a new operation there. to which of the following islands is ron most likely going? a. papua new guinea b. bikini atoll c. tahiti d. palmyra atoll