Which of kepler's laws states that the square of the orbital period of a planet is directly proportional to the cube of the semimajor axis of its orbit?

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

the exclusive possession or control of the supply or trade in a commodity or service.