The number given is 9,576,900 and the digit 7 is underlined.

To round the number to the place value of the underlined digit:

1. Identify the place value of the underlined digit 7: In this case, the digit 7 is in the hundred thousands place.
2. Look at the digit to the right of the underlined digit, which is 6 (in the ten thousands place).
3. Since 6 is 5 or more, you round up the underlined digit 7 to 8.

So, rounding 9,576,900 to the nearest hundred thousand gives us 9,600,000.

Would you like further details or have any questions?

Here are some related questions to explore:

1. How do you round numbers to the nearest million?
2. What is the general rule for rounding numbers?
3. How would you round 9,576,900 to the nearest ten thousand?
4. What happens if the digit to the right is exactly 5 when rounding?
5. How would rounding affect the sum of multiple numbers?
6. Can you round numbers in scientific notation similarly?
7. Why is rounding important in real-world applications?
8. How does rounding differ from truncating?

Tip: When rounding, always remember to focus on the digit immediately to the right of the place value you are rounding to.