Question

Can you help my sis out agan sorry

Answer 1

That would be .51000

Answer 2

`5.1`×
`10^(-4)`

`6.3`×
`10^(-3)`

Explanation:

If you move the decimal 4 times to the right, since it's a negative, you'll get the number 0.00051.

If you move the decimal 3 times to the right, since it's also a negative, you'll get the number of 0.0063.

Hope this helps!