Which of the following is not one of the four main components of US federal government spending? Select the correct answer below:
healthcare
national defense
social security
education

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

What do supreme court decisions based on the first amendment usually involve?

The economy of the united states is best described as