Jenny is sitting on a sled on the side of a hill inclined at 15°. what force is required to keep the sled from sliding down the
hill if the combined weight of jenny and the sled is 90 pounds?
[got deleted from mathematics when it's for pre-calculus, if this isn't physics or math where should i ask my question? ]

we need answer choices

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

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 =