20. how many terms of office can a president serve?

8 Years

Explanation: You can take 2, 4 year terms as president.

10 years

Explanation:

U.S. presidents are limited to serving two elected four-year terms in the White House and as many as two years of another president's term. That means the longest any president could serve is 10 years, though no one has been in the White House that long since Congress passed the constitutional amendment on term limits.

that’s true, tatiana prouskouriakoff established that the inscriptions were primarily historical.   they recorded events in the lives of mayan rulers and their families.

the answer to your question is a because laws act as guidelines as to what is accepted in society. without it there would be conflicts between social groups and communities. it serves as a norm of conduct for citizens.