Question

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

Answer 1

SOLUTION

Write out the expression

$0.000611$

To express the number in standard form, we

$\begin{gathered} A\times10^n \\ \text{where } \\ A=\text{ number} \\ n=\text{exponent} \\ n\text{ is negative when we move to the right } \\ \end{gathered}$

Then we have

$0.000611=6.11\times10^{-4}$

Therefore, the correct scientific notation is

6.11 x 10^-4

The right option is A