What value of a makes f(x)=x^2 +a/x have a local minimum at x=2

Nuclear experimentation is a major global issue that affects relationships between countries. describe why countries try to limit the testing of nuclear weapons.

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

Describe at least three examples of how people and wildlife have adapted to their environments in the middle east.