While buying refreshments for an upcoming party, you notice that a six-pack of Americana Beer costs $2 and a six-pack of Bavarian Beer costs $4. You buy the six-pack of Bavarian Beer, although you wonder if maybe two six-packs of Americana Beer would have been a better choice. The opportunity cost of the Bavarian Beer is
two six-packs of Americana Beer T/F

True

Step-by-step explanation: Opportunity cost is defined as the value of the best alternative given up in making a choice.

From the above question, the opportunity cost of buying two six pack of Bavarian beer is the two six pack of American beer that was not bought.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.