A court case can only be appealed if the Court of Appeals agrees to hear the case.
No, only trial decisions can be appealed.
That would be the Supreme Court.
A case may be appealed from a state court to the Supreme Court if it involves a federal question or if the state court's decision conflicts with federal law.
A case appealed from a U.S. District Court would be reviewed by the U.S. Court of Appeals for the circuit in which the District Court is located. For example, if the case originated in the Southern District of New York, it would be appealed to the Second Circuit Court of Appeals. The Court of Appeals reviews the case for legal errors and can affirm, reverse, or remand the decision of the District Court.
A court decision can be appealed because the court or the attorneys could have made a mistake in the representation of the defendant or in the presentation of the case. Because court cases are tried by humans who make mistakes, they can be appealed.
The decision then remains what it was when appealed to the Supreme Court.
A case can only be "heard" in one court - and that court is the trial court. It is the lowest level court to hear cases. The decision of THAT case in THAT court is final, unless it is successfully appealed. However, Appeals Court do not "hear" cases in the sense that trial couirts do. They don't conduct trials, they only rule on appelate matters.
Not all cases appealed to an appellate court are heard by the appellate court. In such cases the verdict delivered by the lower court of original jurisdiction will stand.
The highest court is the Supreme Court, but not all cases can be appealed to the Supreme Court; it depends what kind of legal issues are involved. Otherwise, the case can be appealed to a Federal Appeal Court. If you can afford the legal fees, of course.
Courts of original jurisdiction are the only courts that can determine the facts of a case. Appeals courts can only determine whether the law was followed, or whether the law itself is legal. If a state law violates the US constitution, it may be appealed to a federal appeals court. Lower federal appeals courts will generally handle the case if it it patently unconstitutional under established precedent. If the issue is not settled, they generally will bump it up to the Supreme Court of the United States. Whether the appeals court accepts the appeal is another question. But there was a case in the 1950s or 1960s where a traffic case from a justice of the peace could not be appealed within the state system because it didn't meet a certain financial threshold, and the Supreme Court of the United States accepted the appeal on the basis that the financial threshold for appealing a case was unconstitutional.
The case is tried in a trial court - If the outcome is not satisfactory to one of the parties to the case, it may appealed to the Court of Appeals. The Appeals Court will review the case and IF THEY WISH TO ACCEPT IT for review, they will consider the case and render a decision on the question contained in the appeal. If that appeal is not satisfactory to one of the parties in the case, that ruling may be appealed, yet again, to the Supreme Court. If the Supreme Court chooses to accept the case, they, too, will hear the case and render a decision. The Supreme Court's decision is the final word and there is no higher appeal.
Not necessarily, there are mechanisms whereby it can still be appealed to the Supreme Court.