What does the Supreme Court decide? number of justices length of time justices serve who gets nominated

The Supreme Court decides on various issues, including interpreting the Constitution, determining the constitutionality of laws and government actions, and resolving disputes between states. The number of justices and their length of service are established by law, and the court does not have the power to change these factors. However, the court does have the power to review and decide on nominations to the court, if there are any legal challenges or controversies surrounding the nomination process.