someone please help me how to answer this asap!! thank you ^^

Answer:
35 nanoguitar strings to have the same width as human hair
Step-by-step explanation:
80 - 10 = 70
10 x 10^-6 = 10^-7
1 human hair = 80 microns = 70 x 10^-7
1 guitar nano string = 2 x 10^-7
70 / 2 = 35