anonymous
  • anonymous
help!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
In an average year America is responsible for about 20,000 kilograms of carbon emission pollution each year. Express this number as a single-digit integer times a power of 10.
jim_thompson5910
  • jim_thompson5910
place a decimal point between the first two digits so we have `2.0`
jim_thompson5910
  • jim_thompson5910
how many places must we move the decimal point to go from `2.0` to `20,000` ?

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More answers

anonymous
  • anonymous
4?
jim_thompson5910
  • jim_thompson5910
yes, we move the decimal point \(\LARGE \color{red}{4}\) spots to the right, so the exponent over the 10 is \(\LARGE \color{red}{4}\) meaning that \[\LARGE 20,000 = 2.0 \times 10^{\color{red}{4}}\]
jim_thompson5910
  • jim_thompson5910
if we move the decimal point to the left, then the exponent would have been negative
anonymous
  • anonymous
so the answer is 10^4?
jim_thompson5910
  • jim_thompson5910
I just showed you the answer
anonymous
  • anonymous
1.0 x 10^4
jim_thompson5910
  • jim_thompson5910
|dw:1443829908625:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1443829923670:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1443829935744:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1443829953929:dw|
jim_thompson5910
  • jim_thompson5910
since 2.0 is really the same as 2
anonymous
  • anonymous
ok thank you

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