Q: How is the number 28,614,721 written in Scientific Notation?
A: 2.8614721 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 28,614,721 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: | 2 | . | 8 | 6 | 1 | 4 | 7 | 2 | 1 |
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 = 2.8614721
b = 7
Now the whole thing:
2.8614721 x 107
Check your work:
107 = 10,000,000 x 2.8614721 = 28,614,721
28,614,719 | 28,614,720 | 28,614,722 | 28,614,723 |
2.8614719 x 107 | 2.861472 x 107 | 2.8614722 x 107 | 2.8614723 x 107 |