Between the 1803 marbury v. madison case and the 1857 dred scott decision, how many acts of congress did the supreme court invalidate as it settled the question of state versus national government power?

Between the 1803 Marbury v. Madison case and the 1857 Dred Scott decision, the number of acts of Congress that the Supreme court invalidate as it was settled in the question of the stave versus national government power is zero. The correct answer of this question is likely to be found from section 7.6, "Supreme court’s place in the federal separation of powers."