A projectile is fired at time t = 0.0 s, from point 0 at the edge of a cliff, with initial velocity components of vox = 50 m/s and voy =200 m/s. The projectile rises, then falls into the sea at point P. The time of flight of the projectile is 50.0 s. The y-coordinate of the projectile when its x-coordinate is 1000 m is closest to:. A) 1240 m
B) 150 m
C) 150 m
D) 2040 m
E) 600 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 =