Each student in a pottery class is responsible for cleaning the area around his or her workspace at the end of the lesson. each student's area is approximately 4 1/2 ft^2 . there are 13 students in the class. assuming that each student cleans his or her area, how many square feet in total is cleaned? solve the problem by each of these methods.

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.

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step-by-step