Jeff uses 116rubber bands to make a rubber band ball. he estimates that he has used 448 rubber bands to make 12 rubber band bottles of the same size. use estimation to check and explain whether his answer is reasonable or not.

His answer is not reasonable.

Step-by-step explanation:

448 rubber bands to make 12 rubber band bottles of the same size.

450 divided by 10  is about 45 rubber band per rubber band bottle.

This is nowhere near the the 116 rubber bands to make a rubber band ball.

If the are about the same size, we should use about the same number of rubber bands.

If he used about 100 rubber bands per rubber band bottle * 12 bottles, that would be about 1200 rubber bands.

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.