Answer:
B.Multiply and C. add
Explanation:
In scientific notation the number can be divided and multiplied rather simply by taking the advantage of the number's property and the exponential rules that should be recall.
In scientific notation the multiplication can be done as by multiply the numbers which are not in the power of 10.
And after that we can multiply the power of ten by adding the exponential terms.
Therefore in scientific notation while determining the product of 2 numbers we can multiply the base and add the exponent of the power of ten.