Simplify the Expression: 20^6 × 20^2 × 20^4 Using Exponent Rules

To solve this problem, we'll follow these steps:

• Step 1: Identify the given expression $20^6 \times 20^2 \times 20^4$.
• Step 2: Apply the rule of exponents for multiplication of like bases, which is $a^m \times a^n = a^{m+n}$.
• Step 3: Add the exponents together to simplify the power expression.

Now, let's work through each step:
Step 1: We have $20^6 \times 20^2 \times 20^4$.
Step 2: Apply the property of exponents: $20^6 \times 20^2 \times 20^4 = 20^{6+2+4}$.
Step 3: Add the exponents: $6 + 2 + 4 = 12$, so the expression simplifies to $20^{12}$.

By checking the given choices, the correct one is:

Choice 4: A'+C' are correct