anonymous
  • anonymous
please help in 1980, your car was worth $25,000, now in 2010 your car is worth $13,000. What is the annual decay rate?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
What is the definition of rate?
anonymous
  • anonymous
If you dont know please tell me.
anonymous
  • anonymous
i dont know what it means

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anonymous
  • anonymous
Rate is change of something over a time interval
anonymous
  • anonymous
usually its written like this\[\Delta Value /\Delta time\]
anonymous
  • anonymous
by how much did the car value went down?
anonymous
  • anonymous
is that what the rate is
anonymous
  • anonymous
thats the equation of rate yes
anonymous
  • anonymous
so what numbers do you plug in to solve it
anonymous
  • anonymous
\[\frac {d _{1}- d _{0}}{t _{1}-t _{0}}\] d1= final value of car d0= initial value of car t1= final year t0= initial year
anonymous
  • anonymous
thanks

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