To express numbers in scientific notation, we rewrite them as a product of a number between 1 and 10 and a power of 10.
For the number 25,000:
- First, we need to convert 25,000 into a number between 1 and 10. We can do this by moving the decimal point four places to the left, which gives us 2.5.
- Since we moved the decimal point four places, we will multiply by 10 to the power of 4.
Thus, 25,000 in scientific notation is: 2.5 × 104
Now, for the number 22,000,000:
- Here, we move the decimal point 7 places to the left to get 2.2.
- Similarly, we multiply by 10 raised to the power of 7.
This means that 22,000,000 in scientific notation is: 2.2 × 107
In summary, the scientific notations are:
- 25,000 = 2.5 × 104
- 22,000,000 = 2.2 × 107