Answer:
The answer to the question 12x^4 (-5/6x^3y^2)
is -10x^7y^2
plug in the number: 4^1 * 4^5
simplify exponents: 4 * 1024
multiply: 4096
If your asking what 9B coefficient is it's B
I did not catch well, but i think you already got your answers. Let me explain. For the first part you got your notation right: for 0.0045 the correct scientific notation is 4.5 x 10^-3. Now the second part, the answer would be the first one, the notation that you are giving is the one who corresponds to <span>4.5 x 10^-2, the first option you have. Hope it helps</span>