.0007
7 ten thousandths in standard form is written as 0.0007.
How do write 666 in standard form?
It is already in standard form.
That is the standard form.
That is the standard form!
That IS the standard form.
You write 83,539,131 in standard form as 8.3539131 × 107
You write 7.54103 in standard form as 7.54103 × 100
You write 6.11 in standard form as 6.11 × 100
You write 20.7 in standard form as: 2.07 × 101
0.9 that is how you write nine-tenths in standard form