Spring98
  • Spring98
Which is the more reasonable measurement of the distance between the tracks on a CD: 1.6 • 10^–3 mm or 1.6 • 10^3 mm? Justify your answer.
Mathematics
schrodinger
  • schrodinger
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Spring98
  • Spring98
@mathlover2014 can you plz help me? i will medal. :)
welshfella
  • welshfella
the distance between them is too small to be seen so its going to be a lot less than 1 mm
welshfella
  • welshfella
are you familiar with negative exponents?

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Spring98
  • Spring98
so is it this 1.6 • 10^3
welshfella
  • welshfella
No 10^3 = 1000 mm
welshfella
  • welshfella
10^-3 = 1/1000 or 0.001
Spring98
  • Spring98
1/1000right?
welshfella
  • welshfella
No - its one of the 2 options in your questiion. The numbers I gave were only examples.
welshfella
  • welshfella
- to help you learn the difference between positive and negative exponents.
Spring98
  • Spring98
ya i know but the negative on will be to small so it will be 1.6 • 10^3 mm
Spring98
  • Spring98
@welshfella am i right?
welshfella
  • welshfella
NO 1.6 * 10^3 = 1,600 mm which is the same as 1.6 meters
welshfella
  • welshfella
check my first post
Spring98
  • Spring98
so the answer will be 1.6 • 10^–3 mm
welshfella
  • welshfella
yes
Spring98
  • Spring98
why?
welshfella
  • welshfella
well have a look at a CD . Can you see the distance between the tracks/
Spring98
  • Spring98
yes
Spring98
  • Spring98
@welshfella would it because the other one would be to big for the tracks of a CD?

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