Question

I inserted a picture of the question can you please please make it short and not long!

Answer 1

Write out the expression

`0.000611`

To express the number in standard form, we

`\begin{gathered} A*10^n \\ \text{where } \\ A=\text{ number} \\ n=\text{exponent} \\ n\text{ is negative when we move to the right } \\ \end{gathered}`

Then we have

`0.000611=6.11*10^(-4)`

Therefore, the correct scientific notation is

6.11 x 10^-4

The right option is A