a. S
Scientific notation is used for representing very large numbers.
It is also used to represent very small numbers.
Scientific notation has three parts.
1st part - coefficient
2nd part - base of 10
3rd part - exponent
Example:
7.1 x 10³
7.1 is the coefficient
10 is the base of 10
3 is the exponent
7.1 x 10³ is the scientific notation of 7100.