Question

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?

Answer 1

Answer: The above answer is correct I showed u the steps down below! I hope this helps! This is from khan academy, by the way.

Explanation:

Answer 2

Given that the diameter of a human hair
`= 9 * 10^(-5)`

Given that the diameter of a spider's silk
`= 3 * 10^(-6)`

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.

`9 * 10^(-5) - 3 * 10^(-6)`

Since powers are not same so let's make them equal

`= 90 * 10^(-6) - 3 * 10^(-6)`

now we can easily subtract the coefficients that is 3 from 9

`= (90-3) * 10^(-6)`

`= 87 * 10^(-6)`

`= 8.7 * 10^(-5)`

Hence final answer is
`8.7 * 10^(-5)`.