A jet takes off from Toronto and flies directly to San Francisco on a heading of (W21S). A wind blows out of form the direction of (S11E). The distance between the two cities is 3564 km and
the jet is capable of cruising at 650 km/h in still air. If the entire trip takes 7.0 hrs what is the jets
ground speed, what is the wind speed and in what direction should the captain point the jet.

i think its c if i'm 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 =