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perl
 3 years ago
Oil consumption is increasing at a rate of 1.9% per year. What is its doubling time?
I'm not sure if this is linear increase or exponential.
if its linear
perl
 3 years ago
Oil consumption is increasing at a rate of 1.9% per year. What is its doubling time? I'm not sure if this is linear increase or exponential. if its linear

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perl
 3 years ago
Best ResponseYou've already chosen the best response.1, no , this website says its exponential http://www.algebra.com/algebra/homework/logarithm/logarithm.faq.question.112025.html

perl
 3 years ago
Best ResponseYou've already chosen the best response.1, if its linear then y = Ao ( 1 + .06*t ) if its exponential then y = Ao ( 1 + .06)^t

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1i think its exponential 2 = 1 ( 1 + 0.06)^t now calculate t

radh
 3 years ago
Best ResponseYou've already chosen the best response.0Oh, wait. That's right. I apologize. I graphed it wrong.

perl
 3 years ago
Best ResponseYou've already chosen the best response.1how will i know if its exponential or not?

perl
 3 years ago
Best ResponseYou've already chosen the best response.1here is another example http://www.physics.uoguelph.ca/tutorials/exp/intro.html

perl
 3 years ago
Best ResponseYou've already chosen the best response.1why isnt the following example linear ? "For example, let's look at a population of wee beasties which increases by 10% per year. If there were 100 wee beasties now, there would be an increase of 10 wee beasties after a year. "

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1see in question it increases 1.9% per year first year let consumption = x next year = 1.9*x/100 later year = 1.9(1.9*x/100)/100 if you plot its graph you get exponential curve try it

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1in your second example population first year = 100 population second year = 110 population third year = 121 it also not linear

perl
 3 years ago
Best ResponseYou've already chosen the best response.1it should be next year consumption = last year consumption* ( 1 + 1.9/100)

perl
 3 years ago
Best ResponseYou've already chosen the best response.1so we have x1 = x x2 = x1 (1.019) x3 = x2 (1.019) = [x1 (1.019) (1.019) ]

perl
 3 years ago
Best ResponseYou've already chosen the best response.1better start with zero, x0 = x x1 = x0 (1.019) x2 = x1 (1.019) = [x0 (1.019) ] (1.019) = x0 (1.019) ^2

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1calculate x1,x2 ,x3 and try to find x2  x1 = x3 x2 if its write then only its linear

perl
 3 years ago
Best ResponseYou've already chosen the best response.1so did you agree with my math?

perl
 3 years ago
Best ResponseYou've already chosen the best response.1right, clearly x2x1 != x3  x2

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1yes i agree so what you think its linear or exponential

perl
 3 years ago
Best ResponseYou've already chosen the best response.1i think its a little ambiguous however

perl
 3 years ago
Best ResponseYou've already chosen the best response.1, you could also have y = x0 ( 1 + .019 * t ) , no ?

perl
 3 years ago
Best ResponseYou've already chosen the best response.1ok how would you word it so that it is linear?

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1let if increase every year is same then its linear for example if population of city inc by 20 people every year then we can say that its linear

perl
 3 years ago
Best ResponseYou've already chosen the best response.1ok , so we wouldnt use percentage for a linear increase

perl
 3 years ago
Best ResponseYou've already chosen the best response.1if there is a percentage growth , like population percentage growth , grows at a constant percentage, it is exponential growth

perl
 3 years ago
Best ResponseYou've already chosen the best response.1ok now doubling time makes sense

perl
 3 years ago
Best ResponseYou've already chosen the best response.1doubling time is the time it takes for the initial amount to grow 100% , leaving you with double

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1yes did you get your answer?

perl
 3 years ago
Best ResponseYou've already chosen the best response.1yes, the math i didnt have trouble with. just the understanding

perl
 3 years ago
Best ResponseYou've already chosen the best response.1i have a much harder problem, differential equation

perl
 3 years ago
Best ResponseYou've already chosen the best response.1its a logistic growth problem

uzumakhi
 3 years ago
Best ResponseYou've already chosen the best response.1ok then now you can close the qustion after giving me medal...............lol

perl
 3 years ago
Best ResponseYou've already chosen the best response.1you stuck it out , good work
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