Answer: [tex]7.8 \times 10^{-5} \text{ meters}[/tex]
Step-by-step explanation:
The length of a vicuna hair = 0.000006 = [tex]0.6 \times 10^{-5}[/tex]
And, the length of the a human hair = [tex]8.4\times 10^{-5}[/tex]
Thus, the difference between the human hair and vicuna hair
[tex] = 8.4\times 10^{-5}-0.6\times 10^{-5}[/tex]
[tex]=10^{-5}(8.4-0.6)[/tex]
[tex]=10^{-5}(7.8)[/tex]
[tex]=7.8\times 10^{-5}[/tex]
⇒ Option D is correct.
