+0  
 
+2
302
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avatar+1107 

The diameter of a human hair is 9*10^−5 meters. 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?

 

Would I add, subtract, multiply, or divide.

MathPeacock  Mar 21, 2018
 #1
avatar+627 
+2

Okay!

 

Here we go!

 

We do subtraction

 

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

 

This is 87/1000000

supermanaccz  Mar 21, 2018
 #2
avatar+89715 
+3

If the question is "how much greater"  we have  subtraction

9* 10^(-5)  - 3* (10)^(-6)  =  0.000087  m

 

If the question is "how many times greater"  we have  division

 

9 * 10^(-5)              3 * 10^6             3 * 10  =       30  times 

_________   =       _______     =

3 * 10^(-6)                   10^5

 

 

 

cool cool cool

CPhill  Mar 21, 2018

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