20 POINTS Kathy and Quinn decide to go for a two day hike. They leave their base camp and hike 38.0 km at 35 degrees south of east. On the second day they walk 46.0 km in a direction of 65 degrees north of east and find a forest ranger´s tower. Determine the magnitude and direction of their resultant displacement between the base camp and the ranger´s tower.

there are no contact forces mentioned on the list of choices that you've provided.

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 =