Simplify the following expression to Scientific Notation: (9 × 1016) 2 (1 point)

Add exponents to get 9 x 1018
Multiply exponents to get 8.1 x 1031
Add exponents to get 8.1 x 1017
Multiply exponents to get 18 x 1032
Multiply exponents to get 8.1 x 1033
Add exponents to get 81 x 1032

8.1 x 1032

Should I add or multiply to get that answer?

To simplify the expression to scientific notation, you should multiply the coefficients and add the exponents.