Set 6: Exponential Functions (Intermediate)

Choice A is correct. Choice A is the correct answer. Perform the exponentiation first. 1. Exponent: $(0.5)^3 = 0.5 \times 0.5 \times 0.5 = 0.125$. 2. Multiply: $100\times 0.125 = 12.5$. Strategic Tip: 0.$5$ is $1 /2$. $(1/2)^3 = 1/8$. $100 /8 = 12.5$. Choice B is incorrect because it represents 2 half-lives ($100\to 50 \to 25$). Choice C is incorrect because it represents 1 half-life.