Question

A mile is about 6 x 104
inches. An
average human hair is 3 x
10-3 inches
thick. About how many
times longer is a
mile than a human hair?

Answer 1

Answer:

Step-by-step explanation:

Given parameters:

              1 mile = 6 x 10⁴ inches

Average human hair  = 3 x 10⁻³ inches

Unknown:

How many times longer is a mile than a human hair;

Solution:

 Since we know that a mile 6 x 10⁴ inches , we can compare this quantity to the human hair;

     Number of times  = $\frac{6 x 10^{4} }{3 x 10^{-3} }$

     Number of times  = 2 x 10⁴⁺³

     Number of times  = 2 x 10⁷

So, a mile is 2 x 10⁷ times longer than the human hair.