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seen Apr 5 at 23:42

Sep
24
awarded  Scholar
Sep
24
accepted How much caffeine is left in your system?
Sep
22
comment How much caffeine is left in your system?
Ok, I believe you have made a fraction addition mistake on your first part. That is x * (.99 / .93) = 1.06 * x. So you are saying after only one week, you have accumulated MORE caffeine in your system than the full amount of one day? Yes it is cumulative but not to that degree.
Sep
22
awarded  Editor
Sep
22
revised How much caffeine is left in your system?
1/2 life source
Sep
22
comment How much caffeine is left in your system?
@copper.hat Lol! I actually don't like coffee, so that's why I used 'caffeine'.
Sep
22
comment How much caffeine is left in your system?
I'm sorry, but both would appear incorrect. Why are you dividing by 700? For one day, you can do it in your head and see that 6.25% is left in your system (100% > 50% > 12.5% > 6.25%). That is 6.25mg, which shows your 2nd part is incorrect as well.
Sep
22
awarded  Critic
Sep
22
awarded  Student
Sep
22
comment How much caffeine is left in your system?
@nbubis ? It's not homework. I just made it up.
Sep
22
comment How much caffeine is left in your system?
I'm sorry but the first part is incorrect. I assume you are using 'x' for the quantity instead of the # of days, but still, the end result, 16^8, is an enormous sum.
Sep
22
asked How much caffeine is left in your system?
May
3
awarded  Supporter
Feb
12
comment What exactly are eigen-things?
Salman Khan should do a screencast on eigen vectors.
Sep
29
awarded  Teacher
Sep
29
answered What is $x^y$? How to understand it?