Q: How is the number 254,390,239 written in Scientific Notation?
A: 2.54390239 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 254,390,239 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 | . | 5 | 4 | 3 | 9 | 0 | 2 | 3 | 9 |
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 = 2.54390239
b = 8
Now the whole thing:
2.54390239 x 108
Check your work:
108 = 100,000,000 x 2.54390239 = 254,390,239
254,390,237 | 254,390,238 | 254,390,240 | 254,390,241 |
2.54390237 x 108 | 2.54390238 x 108 | 2.5439024 x 108 | 2.54390241 x 108 |