After starting the race from rest, sprinter Usain Bolt reached a maximum speed of 12.0 m/s in 2.0 s while running the 100-m dash. What was his acceleration over the first 2.0 s? please help me

answer: what are you talking about?

explanation:

object 2 because all the other ones are wrong

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 =