Let's solve the given expression:

$(8 \times 10^6) + (4 \times 10^7)$

Step 1: Express each term in the same power of 10.

We need to express both numbers with the same power of 10 for easy addition. Let's convert $4 \times 10^7$ to have the same exponent as $10^6$:

$4 \times 10^7 = 40 \times 10^6$

Step 2: Add the two terms.

Now that both terms are expressed as powers of $10^6$, we can add them directly:

$(8 \times 10^6) + (40 \times 10^6) = (8 + 40) \times 10^6 = 48 \times 10^6$

Step 3: Convert to the required form.

This matches the format of the answers. However, none of the options match exactly $48 \times 10^6$. Let's rewrite $48 \times 10^6$ in scientific notation:

$48 \times 10^6 = 4.8 \times 10^7$

Therefore, the correct answer is:

$\boxed{4.8 \times 10^7}$

Would you like more details or have any questions?

Here are 5 related questions to expand your understanding:

1. How would you simplify $(5 \times 10^5) + (7 \times 10^6)$?
2. How do you multiply two numbers in scientific notation, like $(3 \times 10^4) \times (2 \times 10^5)$?
3. What is the difference between standard form and scientific notation?
4. How would you subtract $(6 \times 10^7) - (2 \times 10^6)$?
5. How does adding and subtracting numbers in scientific notation differ from multiplying or dividing?

Tip: When adding or subtracting in scientific notation, ensure the powers of 10 are the same before combining the coefficients.