The diameter of a human hair is 9 / cdot 10^{-5}9?10?5 9, dot, 10, start superscript, minus, 5, end superscript meters. The diameter of a spider's silk is 3 / cdot 10^{-6}3?10?6 3, dot, 10, start superscript, minus, 6, end superscript 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.

8.7 / times 10^{-5}

Step-by-step explanation:

Given that the diameter of a human hair

Given that the diameter of a spider's silk

Now we have to find how much greater is the diameter of a human hair than the diameter of a spider's silk. To find that we just need to subtract the given numbers. Since powers are not same so let's make them equal now we can easily subtract the coefficients that is 3 from 9 = (90-3) / times 10^{-6}

= 87 / times 10^{-6}

= 8.7 / times 10^{-5}