Choice A is the correct answer. Solve for $t$ using continuous compounding.

1. Formula: $30000 = 15000e^{0.065t}$.
2. Divide: $2 = e^{0.065t}$.
3. Natural log: $\ln(2) = 0.065t$.
4. Solve: $t = \frac{\ln(2)}{0.065} = \frac{0.693}{0.065} \approx 10.66 \approx 10.7$ years.

💡 Strategic Tip: Doubling time for continuous growth: $t = \frac{\ln(2)}{r}$.

Choice B is incorrect because this is too long. Choice C is incorrect because this is too short. Choice D is incorrect because this doesn't match the calculation.