Q: How is the number 811,780,042 written in Scientific Notation?
A: 8.11780042 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 811,780,042 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 | . | 1 | 1 | 7 | 8 | 0 | 0 | 4 | 2 |
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 = 8.11780042
b = 8
Now the whole thing:
8.11780042 x 108
Check your work:
108 = 100,000,000 x 8.11780042 = 811,780,042
811,780,040 | 811,780,041 | 811,780,043 | 811,780,044 |
8.1178004 x 108 | 8.11780041 x 108 | 8.11780043 x 108 | 8.11780044 x 108 |