Iii Gold Edition

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Will this work on vista?

http://www.play.com/Games/PC/4-/3511664/Age-Of-Empires-III-Gold-Edition/Product.html?ptsl=1&ob=Price&fb=0&&engine=froogle_videogames&keyword=Age+Of+Empires+III%3A+Gold+Edition+(Full+Game+%26amp%3B+The+War+Chiefs+Expansion+Pack)+(PC)&_$ja=tsid:11518%7Ccc:%7Cprd:3511664%7Ccat:Strategy

i have vista. it should work because it is an old game. i iam sure this will be fine. if you are unsure go on

http://cyri.systemrequirementslab.com/srtest/

it tells you everything you need to know

Half Life

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half life-?

please show me the formula, and how you got about this answer- i really appreciate this, i have a calculus exam next week and dont know how to calculate half life

You need two equations when you're dealing with half-life problems.

t(1/2)=ln2/n where n=decay constant

N(t)=N(i)e^(-nt) where N(t) is the amount of the substance at a certain time and N(i) is the amount initially.

So in 500 days the element decreases by 55%, meaning 45% or .45 is left, let's plug this into our second equation and keep time in units of days.

N(t)=.45N(i), so we get: .45N(i)=N(i)e^(-500n)

We can cancel N(i) on both sides to get: .45=e^(-500n)

Now we wanna take the natural log of both sides to get rid of the e term, so we get: ln(.45)=-500n, n=.001597

Then we can plug into the first equation. T(1/2)=ln(2)/.001597 to solve for the half life. We get 434 days.

How long will it take for a sample of 100mg to decrease to 90 mg? Just plug into the second equation with N(t)=90mg and N(i)=100mg, and plug in the constant we found for n.

90=100e^(-.001597t).

Again, take the natural log of both sides to get: ln(.9)=-.001597t. Solve for t and you get 65.97 days. Always remember what units you're working with.