Choice A is the correct answer. Calculate the ratio.

1. Ratio: $\frac{h(20)}{h(10)} = \frac{15(1.08)^{20}}{15(1.08)^{10}} = (1.08)^{10}$.
2. Estimate: $(1.08)^{10} \approx 2.16 \approx 2.2$.
3. Conclusion: $h(20)$ is about 2.2 times larger.

💡 Strategic Tip: For ratios, factors divide out, leaving a power of the base.

Choice B is incorrect because the difference in inputs (10) is not the multiplication factor. Choice C is incorrect because this is just one step, not 10 steps. Choice D is incorrect because$(1.08)^{10} eq 2$ exactly.