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The problem presented is asking to simplify the expression \( 9.3 \times 10^7 - 3.4 \times 10^6 \) and express the answer in scientific notation.

### Step-by-step solution:

1. **Rewrite both numbers to have the same exponent**:  
   To subtract numbers in scientific notation, it's easier if both numbers have the same power of 10.  
   Let's rewrite \( 3.4 \times 10^6 \) as \( 0.34 \times 10^7 \).

   So now we have:
   \[
   9.3 \times 10^7 - 0.34 \times 10^7
   \]

2. **Subtract the coefficients**:
   Now, subtract the coefficients (9.3 - 0.34):
   \[
   9.3 - 0.34 = 8.96
   \]

3. **Keep the common power of 10**:
   The result is:
   \[
   8.96 \times 10^7
   \]

Thus, the answer is \( 8.96 \times 10^7 \), which corresponds to option **A**.

Would you like further details on the solution or how scientific notation works?

Here are five follow-up questions:
1. How do you add or subtract numbers in scientific notation with different exponents?
2. Why is it important to align exponents when performing operations in scientific notation?
3. Can you express \( 9.3 \times 10^7 \) in standard notation?
4. What are the general rules for converting numbers to scientific notation?
5. What happens if the subtraction results in a negative number?

**Tip**: When working with scientific notation, it's useful to always adjust numbers so that their powers of 10 match, making arithmetic operations straightforward.

Simplify the expression 9.3 × 10^7 - 3.4 × 10^6 and express the answer in scientific notation.

Learn how to simplify the expression 9.3 × 10^7 - 3.4 × 10^6 in scientific notation, focusing on key math concepts and subtraction of numbers with different exponents. Suitable for students in Grades 7-9.

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