Find the sum of 2.35 x 1019 and 3.157 x 1017.

2.38157 x 1036
3.1805 x 1036
2.38157 x 1019
3.1805 x 1019

To find the sum of \(2.35 \times 10^{19}\) and \(3.157 \times 10^{17}\), we can follow these steps:

1. **Express the numbers with a common exponent**:
   - \(2.35 \times 10^{19}\) stays the same.
   - \(3.157 \times 10^{17}\) can be rewritten as \(0.03157 \times 10^{19}\).

2. **Add the coefficients**:
   - \(2.35 + 0.03157 = 2.38157\).

3. **Multiply by the common exponent**:
   - The sum is \(2.38157 \times 10^{19}\).

So, the correct answer is **\(2.38157 \times 10^{19}\)**.

Do you want more details or have any questions?  
Here are 5 related questions:
1. How do you add two numbers in scientific notation with different exponents?
2. What is the process for converting a number to scientific notation?
3. How do you multiply numbers in scientific notation?
4. Can you subtract numbers in scientific notation? How?
5. What are the common uses of scientific notation in real-life scenarios?

**Tip:** Always align the exponents when adding or subtracting numbers in scientific notation to simplify the calculation.

Learn how to add numbers in scientific notation with different exponents. Follow a step-by-step solution to find the sum of 2.35 x 10^19 and 3.157 x 10^17. Understand the process of aligning exponents and adding coefficients in scientific notation. Suitable for students in Grades 7-9.

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