Q: How is the number 389,688,168 written in Scientific Notation?
A: 3.89688168 x 108
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 389,688,168 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: | 3 | . | 8 | 9 | 6 | 8 | 8 | 1 | 6 | 8 |
| Decimal Count: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
There are 8 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 = 3.89688168
b = 8
Now the whole thing:
3.89688168 x 108
Check your work:
108 = 100,000,000 x 3.89688168 = 389,688,168
| 389,688,166 | 389,688,167 | 389,688,169 | 389,688,170 |
| 3.89688166 x 108 | 3.89688167 x 108 | 3.89688169 x 108 | 3.8968817 x 108 |