Find the balance

$375 at 4% interest compounded annually for 3 years

3

Step-by-step explanation:

pay back in 1 year with 3% annual interest $375 at 4% interest annually for 3 years

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.