How do you write #1,287,000,000# in scientific notation?
1 Answer
Explanation:
To put a number into scientific notation:

Move the decimal point right or left until one nonzero digit is to the left of the moved decimal point. Call the number with the moved decimal point
#a# . 
Count the number of places you moved the decimal point, call it
#n# . If you moved the decimal point to the left, that is a factor of#10^n# versus the original number. If you moved the decimal point to the right, that is a factor of#10^{n}# . 
The original number in scientific notation is
#a\times10^n# or#a\times10^{n}# depending on which way you used the decimal point.
This for
by moving the decimal point nine places (
to the left (
Thus