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>
33 is the answer to that question
<h3>Given Equation:-</h3>

<h3>Step by step expansion:</h3>



























It is negative only when the number itself is negative.
hence, sometimes.