Q: How is the number 84,500,407 written in Scientific Notation?
A: 8.4500407 x 107
The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.
Calculating scientific notation for a positive integer is simple, as it always follows this notation:
a x 10b
Follow the steps below to see how 84,500,407 is written in scientific notation.
To find a, take the number and move a decimal place to the right one position.
Now, to find b, count how many places to the right of the decimal.
| New Number: | 8 | . | 4 | 5 | 0 | 0 | 4 | 0 | 7 |
| Decimal Count: | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
There are 7 places to the right of the decimal place.
Building upon what we know above, we can now reconstruct the number into scientific notation.
Remember, the notation is: a x 10b
a = 8.4500407
b = 7
Now the whole thing:
8.4500407 x 107
Check your work:
107 = 10,000,000 x 8.4500407 = 84,500,407
| 84,500,405 | 84,500,406 | 84,500,408 | 84,500,409 |
| 8.4500405 x 107 | 8.4500406 x 107 | 8.4500408 x 107 | 8.4500409 x 107 |