It can be rounded to 9 units.
600
X mm
Exactly as in the question
how do I write 3,000+70+9 in standard form
1.2000 × 10^4
12000, exactly as in the question!
1.2E4 edit: 12000 is already in decimal form
This might not be what you want to know but: 12,000 in standard form is 12,000 12,000 in expanded for is 10,000+ 2,000 Which is 12,000 in standard form
5,000
Twelve thousand.
A 12000 sqft home would probaly use more than 1 unit.
Birtishthermal unit 12000 btu
It can be rounded to 9 units.
12000
12000
2.0012