Try technology? i’m not totally sure but it makes sense
Feathers have more density and less have more mass, feather is super light and a POUND of led isnt
The initial temperature is get when <span>t=0</span><span> namely
So, we have </span>

which is a point of boiling water in <span>212 degrees
Then calculate 15 minutes using the first mentioned formula
You should have </span><span> T(15)=68+144e^(-.04*15)=147.03 degrees</span>
Water is an example of a Polar Molecule. Your answer is A