What is the highest court in the united states made up of 9 justices, their ruling sets
final precedent on the issue?

he Supreme Court receives about 10,000 petitions a year. The Justices use the "Rule of Four” to decide if they will take the case. If four of the nine Justices feel the case has value, they will issue a writ of certiorari.

Explanation:

The U.S. Supreme Court has nine Justices, who are nominated by the president and must be confirmed by a simple majority vote of the Senate. Once appointed, Supreme Court justices serve until they retire, resign, die or are impeached.