Question

Convert 0.0045 from standard form to scientific notation.

Answer 1

Correct answer is A.

$0.0045= \frac{45}{10,000}= \frac{4.5}{1,000}= \frac{4.5}{10^3}=4.5 \times 10^{-3}$

Answer 2

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 4.5 x 10^-2, the first option you have. Hope it helps