i need help with exponential function problems please .. ill give medals and fan..

Question

jdoe0001 · Answer

2 ducks 3 pelicans and 11 seagulls

jdoe0001 · Answer

tis easier if you post the specifics... if anyone knows.. .they'd help

anonymous · Answer

what are the problems

joftheworld · Answer

@TaylorS11

anonymous · Answer

it would have to be at least 55 million because it grew  3 million within 10 years

anonymous · Answer

about 54.5

joftheworld · Answer

i dont get it.. can you explain more ?

anonymous · Answer

okay, the population grew 3 million within 10 years, do you get it?

joftheworld · Answer

no i get that.. but it says its incorrect..

anonymous · Answer

what are the answer choices

joftheworld · Answer

theres no answer choices.. i have to type it.. and its quite sensitive..

joftheworld · Answer

oh okay never mind its not looking for decimals.. its looking for millions so i type 55

anonymous · Answer

that should be right if you rounded up, was it?

joftheworld · Answer

well it said i was correct..

anonymous · Answer

Brilliant!!

anonymous · Answer

Is that it? You said Problems so if you have any more questions let me know! ;)

joftheworld · Answer

attachment

anonymous · Answer

Okay, so from 1995 to 2002 how much did the population grow?

joftheworld · Answer

7 years?

anonymous · Answer

yes, and from 2002  to 2018, how many years is that?

joftheworld · Answer

it growed 4million each 7 years

joftheworld · Answer

16 years from 2002 to 2018

anonymous · Answer

So the growth rate is4 million per 7 years

anonymous · Answer

understand?

joftheworld · Answer

yeah

joftheworld · Answer

so they raise 217million by 2018 ?? or am i off ?

anonymous · Answer

no, it is 4 million for 7 years

anonymous · Answer

7 goes into 16 twice, so 8 million, but we have a leftover 2 years, so 9 million

joftheworld · Answer

so 209million ??

joftheworld · Answer

and since i have to round to the nearest million its 210million ??

anonymous · Answer

No, 201 million plus 9 million equals

anonymous · Answer

no, it would be 8 million, but since 14 years is still 2 away from 16, we estimate that it is one million, so 9 million plus the original 201 million

joftheworld · Answer

next one is this.. but im gonna try it by my self.. just tell me if im making any mistakes..

anonymous · Answer

okay go ahead

joftheworld · Answer

so every 6 years they raise 5 million ??

joftheworld · Answer

but im stuck at adding up the years right.. because 1999 + 6 +6 = 2011.. when its looking for 2012..

joftheworld · Answer

ill brb i have to eat.. ill be back in a few minutes or so.. please stay here.. i need as much help as possible.. thank you :)

anonymous · Answer

lol i just ate that why i was gone soory

joftheworld · Answer

im back lol snack break

anonymous · Answer

ok you are correct, 5 million every 6 years, for 12 years it would be 10 million, and we would end up in 2011. so we would add 1 million for the remaining year to end up in 2012. Do you follow?

anonymous · Answer

12 years:2011:10million     13 years:2012:11million

joftheworld · Answer

so then itll be 187million by 2012

anonymous · Answer

YES!!! Brilliant!

anonymous · Answer

So do you understand now?

joftheworld · Answer

yes thank you.. can you help me with a few other problems?

anonymous · Answer

of course!

joftheworld · Answer

this one seems a little difficult..

anonymous · Answer

Let's use growth rate, $$\frac{ 3300-3000 }{ ?8-0}$$

anonymous · Answer

$$\frac{ 300 }{ 8}$$ then solve: $$300\div8=37.5$$

joftheworld · Answer

so would it be 38?

anonymous · Answer

nope

anonymous · Answer

37.5 is the rate of change per year.

anonymous · Answer

$$37.5\times12=450$$

anonymous · Answer

So the bacteria would be at 3,450

anonymous · Answer

Do you understand?

joftheworld · Answer

yes thanks.. next one is

anonymous · Answer

Do you remember how I solved the other one?

joftheworld · Answer

1200 every 7 hours

anonymous · Answer

No, use rate of change

anonymous · Answer

$$\frac{ 5200-4000 }{ 7-0 }$$

anonymous · Answer

$$\frac{ 1200 }{ 7 }$$

joftheworld · Answer

hmm.. 4000-1200/7 = 400

joftheworld · Answer

whoops 2,800 sorry

anonymous · Answer

no 1200/7

anonymous · Answer

171.4

anonymous · Answer

So now what do we do?

joftheworld · Answer

171.4 * 9 ?

anonymous · Answer

Yes exactly!!

joftheworld · Answer

1,542.6 so round it to 1,543 ?

anonymous · Answer

yes you are doing brilliantly

joftheworld · Answer

it said it was incorrect...

anonymous · Answer

That s strange try 1,548

joftheworld · Answer

no.. that came out incorrect aswell..

anonymous · Answer

IDK what we did wrong

joftheworld · Answer

ill skip to the next one..

joftheworld · Answer

attachment

anonymous · Answer

1800 per two hours or 900 per hour

joftheworld · Answer

900 per hour and 1800 per 2 hours.

joftheworld · Answer

so 13,500 for 15 hours

anonymous · Answer

yes

anonymous · Answer

Okay I have to go so these people will help you! I'm so sorry! But you have been doing brilliantly! @HELP!!!! @superhelp101 @SolomonZelman @undeadknight26 @KlOwNlOvE

joftheworld · Answer

it says its incorrect D:

anonymous · Answer

I'm so sorry but those people will help you bc i have to go!

joftheworld · Answer

@superhelp101 any idea what we did wrong on the last problem ?

anonymous · Answer

hmm i wouldnt use that formula id use arithmetic sequence because you basically have information for it and its simple

anonymous · Answer

but first we need to find the growth per hour

anonymous · Answer

7800-6000=1800/2=900

joftheworld · Answer

900 per hour. 1800 per 2 hours

superhelp101 · Answer

okay, i think you got this @KlOwNlOvE !! :)

anonymous · Answer

@superhelp101 would it still work? or does that formula need to be used

superhelp101 · Answer

well i am not sure but i use the formula

anonymous · Answer

you use that one ill use arithmetic and compare answers?

anonymous · Answer

a1+(n-1)d
a1=starting point
n=solving for
d=difference

superhelp101 · Answer

okay after that i'll show you what i get and we will se if our answers are right !