1.2000 × 10^4
12000, exactly as in the question!
1.2E4 edit: 12000 is already in decimal form
Twelve thousand.
5,000
A 12000 sqft home would probaly use more than 1 unit.
12000
12000
It can be rounded to 9 units.
To write 12000 in standard form, you need to express it as a number between 1 and 10 multiplied by a power of 10. In this case, 12000 can be written as 1.2 x 10^4 in standard form. This is because you move the decimal point to the left until there is only one non-zero digit to the left of the decimal point, and then count the number of places you moved the decimal to determine the exponent on 10.
2.0012
12,000 is twelve thousand.