angiepangie0726
  • angiepangie0726
I really need some help :(
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
The question?
angiepangie0726
  • angiepangie0726
The function f(x) = 4(3)x represents the growth of a dragonfly population every year in a remote swamp. Erin wants to manipulate the formula to an equivalent form that calculates four times a year, not just once a year. Which function is correct for Erin's purpose, and what is the new growth rate?
angiepangie0726
  • angiepangie0726
Do you think you can help me out? @juliastevens

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anonymous
  • anonymous
As much as i would love two, im not good at that kind of math, im very sorry.
angiepangie0726
  • angiepangie0726
Ok :/
angiepangie0726
  • angiepangie0726
do you know anyone who could?
angiepangie0726
  • angiepangie0726
angiepangie0726
  • angiepangie0726
anonymous
  • anonymous
Do you know which number in the formula represents the growth rate?
anonymous
  • anonymous
angiepangie0726
  • angiepangie0726
3? i think
anonymous
  • anonymous
right, so if it's 3 for the whole year, divide it by 4 to get the growth rate every quarter
angiepangie0726
  • angiepangie0726
ok, 0.75
angiepangie0726
  • angiepangie0726
these are my choices f(x) = 4(3)x; growth rate 300% f(x) = 4(3)x, growth rate 4% f(x) = 4(1.32)x; growth rate 4% f(x) = 4(1.32)4x; growth rate 32%
angiepangie0726
  • angiepangie0726
would it be b?
mathmate
  • mathmate
@angiepangie0726 Is the formula an exponential? If it is you need to put the ^ sign to show that it is an exponential function. f(x)=4(3^x) is the same as \(f(x)=4(3^x)\)
angiepangie0726
  • angiepangie0726
4(3)^x
anonymous
  • anonymous
nvm. I think the growth rate is 2 on the year. I think the formula's something like a(1 +r)^x
anonymous
  • anonymous
I'm not at all sure about this anymore. talked myself in circles :/

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