Why is scientific notation used?
to round numbers to the nearest whole number.
to promote reproducibility of data.
to increase the validity of data.
to express very large or very small numbers.

to express very large or very small numbers.c

Step-by-step explanation:

Scientific notation or scientific form is a way of expressing numbers that are too large or too small to be appropriately written in decimal form.

It is expressed as the product of a decimal form of number [commonly between 1 and 10] and powers of ten.

Hence, the scientific notation used to express very large or very small numbers.