First of all, that's not an equation. An equation needs an 'equals' sign ( = ),
so you need something like
Amount present = a e^-0.0025t .
'a' = amount present when t = 0 .
The half-life is the time it takes for the original amount to decay to half of it.
That's just 't' when e^-0.0025t = 1/2
Take the natural log of each side: -0.0025t = ln(0.5)
Divide each side by -0.0025 : t = ln(0.5) / (-0.0025) =
(-0.69315) / (-0.0025) =
<em>t = 277.26 minutes</em>
( 4hrs 37min 15.5sec)
Rounded to nearest tenth: t = 277.3 minutes .
Gradpoint? The answer is B
The best and most correct answer among the choices provided by the question is drag<span>.
</span><span>Drag </span>kind of friction exists between solid objects moving in water.
Hope my answer would be a great help for you.
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I am pretty sure that <span>the following whihc cannot be determined by looking at the phase diagram is definitely </span>D. system pressure. I consider this one to be correct because only this point is not included into<span> phase diagram and can't be determined itself. Hope it will help! Regards!</span>
