100 points help..i need this

6.42 rounds, or just 6 rounds

Step-by-step explanation:

3 3/4 hours is 225 minutes, 7/12 of an hour is equal to 35 minutes, 225 divided by 35 equals to 6.42.

Step-by-step explanation:

multiplying 3*3 and 4*3 we get (3 and9/12). 3 goes as 36 so we get 45/12

45/12 so we get 3.75 rounds

for the points! : )

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.