Using a lever, a person applies 80N of force and moves the lever 3 meters. This moves a 400 N rock at the other end by 0.6 meters. What is the efficiency of the machines?

the answer would be 32*f

that the claims meet official rules.

don't misinterpret the claims

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =