Question

Hey friends answer this please
Please give the letter choice

Answer 1

$1.2\cdot 10^{-3}-2.0\cdot 10^{-4}=1.2\cdot 10^{-3}-0.20\cdot 10^{-3}\\\\=1.0\cdot 10^{-3}$

The appropriate choice is ...

... D) 1.0×10⁻³ inch