Acar travels from philadelphia to new york with a speed of 36 km/h. what will be the car's displacement in 2 hours?

0
72 m, north
72 km
72 km, north

(ps i'm pretty sure it would be 72 km, north because it specifies the direction when the speed doesn't specify any direction.)

that the claims meet official rules.

don't misinterpret the claims

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 =