Final answer:
6,987,000,000 expressed in scientific notation is 6.987 × 109, which is option A. To express 6,987,000,000 in scientific notation, we need to place the decimal after the first non-zero digit and count the number of places the decimal has been moved.
Step-by-step explanation:
Here, we would place the decimal after the first 6, which makes it 6.987. Since we moved the decimal 9 places to the left, we then multiply this number by 10 raised to the power of 9. This gives us 6.987 × 109.
Therefore, the correct answer is: A) 6.987 × 109. This is the number 6.987 multiplied by 10 to the 9th power, which represents the original number in a simplified form.