mark invested a certain amount at 5 % simple interest per year after 10 year he received an interest of 50000 how much did he invest​

i believe its 2,500

hope this helps just tryna get points but give you the right answer

Step-by-step explanation:

100,000

Step-by-step explanation:

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.

both equations and proportions are better.