Here's how we get there:
1. Move the decimal point: Start with the number 91007500. Move the decimal point 7 places to the left until you have a number between 1 and 10. This gives you 9.10075.
2. Exponent: Since we moved the decimal 7 places to the left, the exponent of 10 is positive 7.
3. Combine: The scientific notation is then 9.10075 x 107.
