Answer:
The order from least to greatest will be -
8.11x10^-3 , 435 , 34x10^2 , 1.2x10^7
Explanation:
First lets covert all the notation form in normal numeral form, as this will help in comparing the numbers better.
34x10^2 =3400
1.2x10^7 = 12000000
8.11x10^-3 = 0.00811
435
Now it is easy to write in ascending order.
The order from least to greatest will be -
8.11x10^-3
435
34x10^2
1.2x10^7