Make the following changes to the number 7.849:

1. Round the number to the nearest whole number: 8.

2. Round the number to one decimal place: 7.8.
3. Round the number to two decimal places: 7.85.
4. Express the number as a fraction: 7.849 can be written as 7849/1000.
5. Convert the number to a percentage: 7.849 can be written as 784.9%.
6. Express the number in scientific notation: 7.849 can be written as 7.849 x 10^0.