In order to be considered valid, a supreme court decision must
be agreed to by
all of the nine justices
six of the nine justices
seven of the nine justices
ve of the nine justices

Five of the nine justices have to agree

Explanation:

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.