Question

Problem

The diameter of a human hair is 9*10 ^-5
The diameter of a spider's silk is 3*10^-6 meters.
How much greater is the diameter of a human hair than the diameter of a spider's silk?
Write your answer in scientific notation.

Answer 1

8.7*10^-5

Explanation:

Answer 2

`\bf \cfrac{\stackrel{\textit{human hair}}{9* 10^(-5)}}{\stackrel{\textit{spider hair}}{3* 10^(-6)}}\implies \cfrac{9}{3}* \cfrac{10^(-5)}{10^(-6)}\implies \cfrac{3}{1}* \cfrac{10^(-5)10^(6)}{1} \\\\\\ 3* 10^(-5+6)\implies 3* 10^1`