Um balão tem sua trajetória representada pela equação S = 4 x t²-24 x T + 36 A)em que instante o balão passa pela origem(S=0)da trajetoria

B)determine a velocidade no instante T=3s

me ajudem pls

a coal burning power plant

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 =

3. dark matter

empty space could also be a simple vacuum