whats 0.667 x 10's exponential form

I am not sure what you mean?

perhaps

whats 0.667 x 10's exponential form

$$\\10^x=6.67\\
x=log(6.67)\\
x=0.824125833\\
so\\
6.67=10^{0.824125833}$$

0.667*10=667*10^(-2)