Question

Multiply (1.2 ⋅ 10^28) ⋅ (3 ⋅ 10^−19). Express the answer in scientific notation.

Answer 1

I was thinking its 3.6 x 10^6
but it's not my option so I need help.

Answer 2

Okay for this question, we'd solve it like this:

Note: When multiplying numbers with the same base, you ADD the exponent (power).
For e.g.