9.3*107
93000000 is, itself a whole number so you would write it exactly as in the question.
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example. You would usually write it with comma separators as: 3,450
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, your example is written in standard form.
123
The way you wrote it is the standard notation. Standard notation means to write the number in its standard form. So, a number such as 150 is simply written as 150 in standard notation. The same applies to decimals.
93000000 is, itself a whole number so you would write it exactly as in the question.
9.3 x 107
The number 93,000,000 written as a Roman numeral would be [XCIII] with a horizontal bar placed above it (which I can't write with my keyboard).
ninety-three million.
93000000
You would write it like this 1.0761911
You would write it as 1.7x102
26,300,000,000
5,200,000,000
The standard notation for the number 3.4 billion is 3,400,000,000.
To write this number in standard form in millions would be 810,300,000.4.
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example. However, one would usually write it with comma separators as: 8,900