2. What would be the effect on the United States if this decision had not
validated the idea that the Supreme Court has the power to judge
whether acts of Congress are unconstitutional?

This would have made the Congress as the ultimate power in the democratic system.

Explanation:

It is dangerous for the legislature or the executive to not have a system of checks and balances which is maintained by the judiciary in the system of democracy.

This would have been meaningless if  the jury had no power to declare an act from the congress as unconstitutional. As it has this power, the legislature can be kept in check against compromising the constitution and getting away with it if it ever happens.

according to greek mythology, persephone, the queen of the underworld, was the daughter of zeus and demeter, the goddess of harvest and fertility. she was also called kore, which means "maiden" and grew up to be a lovely girl attracting the attention of many gods.

explanation:

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.