anonymous
  • anonymous
The United States is the world’s largest consumer of petroleum; China is second. In 2000, the United States consumed 19.7 million barrels per day; this increased to 20.7 million barrels per day by 2007. In 2000, China consumed 4.8 million barrels per day; this increased to 7.6 million barrels per day by 2007. Find exponential equations for the oil consumption of each country, where y is millions of barrels of petroleum per day and x is the year after 2000. Assume the yearly growth rate has been constant in each country.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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phi
  • phi
\[ y= Ae^{kt} \] A is your initial value at time=0 (year 2000) solve for k using the 2nd data point
anonymous
  • anonymous
what is the answer exactly?
phi
  • phi
I have not worked it out.

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phi
  • phi
I do notice they want you to use x instead of t for years since 2000
phi
  • phi
If you know y, A, and t, do you know how to solve for k? (by taking the log of both sides?)
anonymous
  • anonymous
no
phi
  • phi
If you have time, this explains logs better than I can http://www.khanacademy.org/math/algebra/logarithms/v/introduction-to-logarithms

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