How do you write 250000000 in expanded notation using power of 10?

To write 250,000,000 in expanded notation using powers of 10, you can express it as (2.5 \times 10^8). This represents the number as 2.5 multiplied by 10 raised to the 8th power, indicating that the decimal point is moved 8 places to the right. Alternatively, it can also be written as (2 \times 10^8 + 5 \times 10^7).