Question

@perl Please help.

Answer 1

Did you see the question?

Answer 2

Is this the problem :
Ruby has been studying an invasive population of snails. This particular snail has no local predators, so the population grows wildly. She has observed that the population follows an exponential rate of growth for fifteen years. Create your own exponential function, f(x), which models the snail population. You will need to identify the principal population of the snails and the rate of growth each year.

Answer 3

Yes

Answer 4

it looks like they don't give you the initial population or rate of growth , so you can choose that yourself.

Answer 5

So any number will do?

Answer 6

I think so, but try to be realistic too

Answer 7

For rate of change and principle, could I start like at 5 and rate of change 3?

Answer 8

you want rate of growth to be a percent

Answer 9

I can't start at 1, right because there needs to be 2, with one we would stay the same.

Answer 10

Here is an exponential equation we can use

f(x) = P ( 1 + r ) ^ t

P represents the initial population.
r represents the rate of growth.
t represents the number of years.

Answer 11

so .03 would be converted to a decimal.

Answer 12

r is a decimal in that equation

Answer 13

Let me try plugging it in and solving.

Answer 14

also I think we want a high growth rate, since its called 'invasive snails'
if they grow slow then it wont be invasive

Answer 15

3% is a low growth rate

Answer 16

the 'invasive snails' will dominate the local snail population, which is also increasing but at a much slower rate

Answer 17

so maybe 15

Answer 18

or should it be higher to be more 'invasive'

Answer 19

right

Answer 20

since it says
"This particular snail has no local predators, so the population grows wildly. "

Answer 21

Is 30 high enough

Answer 22

I would pick something greater than 50% , even 100% will do

Answer 23

100% growth rate means that it doubles every year , the population

Answer 24

ohh. yeah because we did just start at 5 so I think I would use .80

Answer 25

that sounds good :)

Answer 26

Well to plug in and work out, I can work it out myself and if I need you to clear anything out, I will ask for your assistance. Thank you because I was really stuck and I would have not known that I could choose the numbers myself, I am not so good with word problems but I'm working on them. I will fan and of give you the medal you earned. I don't want to waste your time any further, Thanks.

Answer 27

Your welcome. :D

Answer 28

excuse me @satellite73, how are you a moderator, do you have to be so high? Just curious.

Answer 29

perl could you answer that?

Answer 30

Your also a moderator

Answer 31

I can't comment on moderator issues. But you can ask the ambassadors about that (I think).

Answer 32

Oh sorry, I didn't know that, what do you mean info on feedback?

Answer 33

You can find a lot of information about open study in openstudy feedback

Answer 34

if you read the threads

Answer 35

oh well thanks

Answer 36

=)

Answer 37

woah, you been in the question for so long!