30. If air resistance is negligible, the dista between the base of the cliff and the place w the object reaches the ground is most nearly A) 50 m B) 60 m C) 150 m D) 180 m E) 90 mIAT sensor

I think the answer is C

Explanation:

) 150 m

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 =