• Pretend that you have just met somebody who has never jumped
before. What instructions could you provide to get the person to jump up (that is, which way do you apply the force when you
push with your feet)?

your answer is c! hope this : )

the answer is 12 as i may remember

: )

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 =