[CandyApples]

Could someone please check to make sure my logic is correct in this first order question.
The rate constant is 1.2 * 10^-4. T = 1500 years. Concentration is not given (it wants a ratio).
Using integrated rate law for first order:
ln[A] = -kt + ln[Ao]
ln[Ao] - ln[A] = .18 or kt
ln[Ao/A] = .18
Ao/A = e^.18 = 1.20.

Thanks in advance

[renge ishyo]

The steps look O.K. Be sure and double check the units on the rate constant to make sure they are in years^-1 otherwise when you multiplied k by 1500 years the value there would be off.