You would write it like this 21,000,000 or 2.1*10^6.
Another Answer:-
It is the same as in scientific notation and it is: 2.1*10^7
You would write it like this 21 or 2.1*10^1.
20,000,000,000,000,000,000,000
21,000,000
It is already in standard form.
In its simplest form 525/1000 = 21/40
15,021,000
You would write it like this 21 or 2.1*10^1.
2.0*1021 is already in standard form!
63,021,002
It is 8.021
To write 21 hundred-thousandths in standard form, you first recognize that "hundred-thousandths" is equivalent to dividing by 100,000. Therefore, 21 hundred-thousandths is 21/100,000. In standard form, this would be written as 0.00021.
20,000,000,000,000,000,000,000
To express the number 4,000,000 plus 700 plus 21 in standard form, first add the values together: 4,000,000 + 700 + 21 = 4,000,721. In standard form, this is written as (4.000721 \times 10^6).
hundred thousandths = 1/100,000 → 4 and 21 hundred thousandths = 4 21/100000 = 4.00021
21,000,000
It is already in standard form.
15,021,000 its easy all you do is out 21 at the end put a zero in front of it.