I’m not quite sure but I think it could be c. 768
6×10^-3
Step-by-step explanation:
0.006
Move the point to the front of the first number that is from 1 to 9.
In the question it's 6, so you move it to the front of 6 .
And because it's from back to front it has to have a negative sign in its power
which is going to be
6× 10^-3
where 6=the number from 1 to 9
^ means raise to power or power of
-3= the negative power