How can you show 198.000 as a power of using an exponents

1.98 * 10²

1. Move the decimal so that the number is now below 10 - 1.98

2. Count how many decimal places there are - 2

3. Now write it out like this - 1.98 * 10²

Multiply it by 10 so that the decimal place is moved over to the right again.