Final answer:
The number 40,500,000 converted to scientific notation is 4.05 × 10^7.
Step-by-step explanation:
To convert the number 40,500,000 into scientific notation, you need to place the decimal after the first non-zero digit and count the number of places you move the decimal to get back to the original number. In this case, you would move the decimal seven places to the left, making it 4.05. Then, you would multiply by 10 raised to the power of the number of places you moved the decimal, which is 7. Therefore, the number 40,500,000 written in scientific notation is 4.05 × 107.