Given the following sets.
a=(0,1,2,3)
b=(a, b,c, d)
c=(0,a,2,b)
find a n c.

  A ∩ C = {0, 2}

Step-by-step explanation:

The elements that sets A and C have in common are {0, 2}.

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.

saving = more money

step-by-step explanation:

if you have 100 bucks, and you want to buy a candy bar, even if you have one at home, if you choose not to buy it, you save.

~courtney