Answer:
Option D [tex]1*10^{-3}\ in[/tex]
Step-by-step explanation:
The correct question is
The diameter of a strand of rope is 1.2x10^-3 inch. the diameter of a strand of floss is 2.0x10^-4 inch. how much longer is the diameter of the strand of rope than the diameter of the strand of floss?
we know that
To find out how much longer is the diameter of the strand of rope than the diameter of the strand of floss, subtract the diameter of the strand of floss from the diameter of the strand of rope
so
[tex]1.2*10^{-3}-2*10^{-4}[/tex]
Remember that
[tex]1.2*10^{-3}=12*10^{-4}[/tex]
Because
[tex]1.2*10^{-3}=1.2*10^{-3}\frac{10^{-1}}{10^{-1}}=1.2*10^{-4}(10)=12*10^{-4}[/tex]
substitute in the expression above
[tex]12*10^{-4}-2*10^{-4}=10*10^{-4}\ in=1*10^{-3}\ in[/tex]
